Y add mul c mul pow x1 c add x4 add mul c x3 mul x1 mul x3 add x4 mul c pow add x3 add x4 add mul c cos c mul pow x4 c cos x4 c mul x3 mul pow x1 c add x4 mul c pow add x3 add x4 add mul c cos c mul pow x4 c cos x4 c