This is a verry simple calculator.

This is the difrent things you can do: (thiese commands are examples and after 'returns' there is what comes out after doing that command)

add_num(1,1)  
returns 2

subtract_num(2,1)
returns 1

multiply_num(5,2)
returns 10

divide_num(10,2)
returns 5

exponent_num(2,10)
returns 1024