if the sum and difference of two numbers are 5 and 10 respectively , then the difference of their square is :
"let the numbers be x and y . then , x + y = 5 and x - y = 10 x 2 - y 2 = ( x + y ) ( x - y ) = 5 * 10 = 50 . answer : a"
subtract(power(divide(add(5, 10), const_2), const_2), power(subtract(5, divide(add(5, 10), const_2)), const_2))