This time we want to write calculations using functions and get the results. Let's have a look at some examples:

seven(times(five())); // must return 35 four(plus(nine())); // must return 13 eight(minus(three())); // must return 5 six(dividedBy(two())); // must return 3

There must be a function for each number from 0 ("zero") to 9 ("nine") There must be a function for each of the following mathematical operations: plus, minus, times, dividedBy Each calculation consist of exactly one operation and two numbers The most outer function represents the left operand, the most inner function represents the right operand Division should be integer division. For example, this should return 2, not 2.666666...: eight(dividedBy(three()));