if x is equal to the sum of the integers from 60 to 80 , inclusive , and y is the number of even integers from 60 to 80 , inclusive , what is the value of x + y ?
"x = 60 + 61 + . . . + 80 = 21 ( 70 ) = 1470 y = 11 x + y = 1481 the answer is b ."
add(multiply(divide(add(60, 80), const_2), add(subtract(80, 60), const_1)), add(divide(subtract(80, 60), const_2), const_1))