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