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