Y add mul x2 mul pow x1 c mul pow x3 c pow add x2 mul c mul x2 cos add c add x1 cos x3 c mul div c c mul pow x2 c mul pow x1 c mul pow x3 c mul add c mul c cos add c add x1 cos x3 add x2 mul c mul x2 cos add c add x1 cos x3