find the sum of first 26 natural numbers
"explanation : sum of n natural numbers = n ( n + 1 ) / 2 = 26 ( 26 + 1 ) / 2 = 26 ( 27 ) / 2 = 351 answer : option d"
add(divide(divide(26, divide(divide(divide(divide(divide(26, const_2), const_2), const_2), const_2), const_2)), const_2), add(const_1, sqrt(divide(divide(26, divide(divide(divide(divide(divide(26, const_2), const_2), const_2), const_2), const_2)), const_2))))