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