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