1,20,crafting-speed,100*L,automation-science-pack,logistic-science-pack,150*L,chemical-science-pack,225*L,production-science-pack,300*L,utility-science-pack,500*L,1000*L,space-science-pack,inventory-size,175*L,production-science-pac,500*2^L,mining-speed,movement-speed,player-reach,5,1,6,5,20,0,0,2,20,1,1,3,5,10,3,1,4,5,30,2,1,3,1,4,6,10,3,1,6,7,30,3,1,3,1,4,1,6,6,10,3,1,8,9,30,4,1,3,1,4,1,6,1,8,8,10,3,1,10,11,30,5,1,3,1,4,1,6,1,8,1,10,10,10,3,1,10,12,60,6,1,3,1,4,1,6,1,8,1,10,1,13,14,6,2,10,0,0,5,20,1,1,3,2,10,1,1,4,15,30,2,1,3,1,4,1,10,1,1,6,7,30,3,1,3,1,4,1,6,1,10,1,1,10,9,30,4,1,3,1,4,1,6,1,10,1,10,1,1,0,11,30,6,1,3,1,4,1,6,1,10,1,13,1,16,0,10,1,1,13,17,60,5,1,3,1,4,1,6,1,10,1,13,18,6,4,30,0,0,2,20,1,1,3,4,20,2,1,4,5,30,2,1,3,1,4,5,10,3,1,6,7,30,3,1,3,1,4,1,6,5,10,3,1,8,9,30,4,1,3,1,4,1,6,1,8,5,10,3,1,10,11,30,5,1,3,1,4,1,6,1,8,1,10,5,20,3,1,13,17,60,6,1,3,1,4,1,6,1,8,1,10,1,13,19,6,5,10,0,0,2,20,1,1,3,5,5,3,1,4,5,30,2,1,3,1,4,5,5,3,1,6,7,30,3,1,3,1,4,1,6,5,5,3,1,10,9,30,4,1,3,1,4,1,6,1,10,5,5,3,1,8,11,30,5,1,3,1,4,1,6,1,10,1,8,10,5,3,1,13,12,60,6,1,3,1,4,1,6,1,10,1,8,1,13,20,6,3,5,0,0,2,20,1,1,3,4,3,2,1,4,5,30,2,1,3,1,4,3,3,3,1,6,7,30,3,1,3,1,4,1,6,4,4,3,1,8,9,30,4,1,3,1,4,1,6,1,8,5,5,3,1,10,11,30,5,1,3,1,4,1,6,1,8,1,10,0,5,3,1,13,12,60,6,1,3,1,4,1,6,1,8,1,10,1,13

The research for adding more toolbelts should probably require you to research the vanilla toolbelt upgrade first by default, the same way that the logistic request slots one does?

Providing you with a little bug reported as requested in the tooltip of the research.

Modlist;

{
  AfraidOfTheDark = "1.1.1",
  AutoDeconstruct = "0.3.8",
  BlueprintLab_Blu3wolf = "1.0.4",
  Bottleneck = "0.11.7",
  ["Chunk-Aligned"] = "1.1.69",
  CleanFloor = "1.1.0",
  EvoGUI = "0.4.601",
  GhostOnWater = "0.12.1",
  LandfillEverything = "1.1.2",
  LogisticRequestManager = "1.1.31",
  Milestones = "1.3.20",
  ModuleInserter = "5.2.4",
  ["Power Armor MK3"] = "0.4.2",
  RateCalculator = "3.2.3",
  RecipeBook = "3.5.6",
  SE_Cheaper_Floors = "1.0.0",
  SE_smooth_ship_walls = "1.0.0",
  SantasNixieTubeDisplay = "0.1.12",
  ["Squeak Through"] = "1.8.2",
  TimeTools = "2.1.44",
  UltimateResearchQueue = "1.0.12",
  VehicleSnap = "1.18.5",
  Waterfill_v17 = "1.1.0",
  YARM = "0.10.13",
  ["aai-containers"] = "0.2.11",
  ["aai-industry"] = "0.5.20",
  ["aai-loaders"] = "0.1.4",
  ["aai-signal-transmission"] = "0.4.8",
  ["aai-vehicles-flame-tumbler"] = "0.6.1",
  ["aai-vehicles-ironclad"] = "0.6.8",
  ["alien-biomes"] = "0.6.8",
  ["alien-biomes-hr-terrain"] = "0.6.1",
  base = "1.1.87",
  ["bullet-trails"] = "0.6.2",
  ["calculator-ui"] = "1.1.1",
  ["combat-mechanics-overhaul"] = "0.6.24",
  ["creative-mod"] = "1.8.1",
  cybersyn = "1.2.16",
  ["equipment-gantry"] = "0.1.5",
  ["even-distribution"] = "1.0.10",
  ["far-reach"] = "1.1.3",
  fast_trans = "1.1.3",
  flib = "0.12.9",
  ["grappling-gun"] = "0.3.3",
  helmod = "0.12.19",
  informatron = "0.3.4",
  jetpack = "0.3.13",
  ["power-grid-comb"] = "1.1.0",
  pushbutton = "1.1.1",
  qol_research = "3.3.3",
  robot_attrition = "0.5.15",
  ["rocket-log"] = "1.1.11",
  ["shield-projector"] = "0.1.6",
  simhelper = "1.1.4",
  ["space-exploration"] = "0.6.113",
  ["space-exploration-graphics"] = "0.6.15",
  ["space-exploration-graphics-2"] = "0.6.1",
  ["space-exploration-graphics-3"] = "0.6.2",
  ["space-exploration-graphics-4"] = "0.6.2",
  ["space-exploration-graphics-5"] = "0.6.1",
  ["space-exploration-menu-simulations"] = "0.6.8",
  ["space-exploration-postprocess"] = "0.6.26",
  stdlib = "1.4.8",
  textplates = "0.6.10"
}

Would you consider adding compatibility with the Nullius mod?

It is a full overhaul mod that makes it so that other mods need explicit compatibility for their content to be available.
As such, the qol techs added by your mod are unavailable.
I'm don't know how much work it is to add compatibility, but Nullius' FAQ page has a section explaining how to add compatibility with it.

Mod settings resets to defaults when changing other mods (installing/updating): i use no basic bonuses for crafting/speed/mining, but it resets to value = 1 (+100% base modifier)

Load game screen after adding another mod:
http://dl4.joxi.net/drive/2019/03/06/0003/2693/236165/65/a0ecd09a03.jpg
Current bonuses (+10 slots gained from toolbelt upgrade from base game):
http://dl3.joxi.net/drive/2019/03/06/0003/2693/236165/65/f9d8d6280d.jpg

A set of technologies that increase player health would be really cool.

When I downloaded the mod and inserted it into the mod folder the mod didn't show up on factorio.

All mods need a new tag to work with newest Factorio

0.16.23 broke the trick I used to hide the internal technologies.

I've submitted a modding interface request in order to hide them again: https://forums.factorio.com/viewtopic.php?t=57876

the problem: internal technology is visible with IRQ's notifications

how to reproduce: install IRQ, open its per-player settings, ensure "Research completion notifications" is checked, then load any map and research any QoL tech

i dont think this is a huge deal personally, and if i hadn't noticed that the tooltip asks me to file a bug report i probably wouldn't have, but since i did notice it i figured i should probably at least make sure you're aware of it
thanks for the great mod btw!

https://forums.factorio.com/viewtopic.php?f=34&t=88764&p=510005#p510005

I want to use the log() and sqrt() functions to make the cost more forgiving when researching each level of qol research but currently I don't have a clue how to do this with your mod or atleast something like that now

Factorio: 0.18.27
qol_research: 3.1.0

When loading the mod, the below error is shows.

What should happen: loading without the se-Biological-science-pack error