연습문제 1.3

(define (square x) (* x x))
(define (sum-with-biggest-two a b c)
  (cond ((and (> a b) (> c b)) (+ (square a) (square c) b))
        ((and (> a c) (> b c)) (+ (square a) (square b) c))
        (else (+ (square b) (square c) a))))