if x is equal to the sum of the integers from 10 to 30 , inclusive , and y is the number of even integers from 10 to 30 , inclusive , what is the value of x + y ?
"x = 10 + 11 + . . . + 30 = 21 ( 20 ) = 420 y = 11 x + y = 431 the answer is d ."
add(multiply(divide(add(10, 30), const_2), add(subtract(30, 10), const_1)), add(divide(subtract(30, 10), const_2), const_1))