Y mul add mul pow add x1 mul pow x1 c cos x2 c add c pow x1 c mul c mul pow x1 c mul add x2 mul x2 pow x1 c mul add x1 mul pow x1 c cos x2 sin x2 cos mul pow add x1 mul pow x1 c cos x2 c add x2 mul x2 pow x1 c