if you add all the numbers on your mobile phone except 9 , what is the answer ?
"we have to add 0 to 8 to find the answer . therefore 0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 = 36 answer is d"
multiply(divide(add(const_1, subtract(const_10, const_1)), const_2), subtract(const_10, const_1))