Y mul pow add x2 mul pow add c x3 c add mul c x1 mul pow x3 c add c add x2 mul c x3 c mul add mul pow add c x3 c add mul c x1 mul pow x3 c add c add x2 mul c x3 mul c mul pow add c x3 c add mul c pow x3 c mul c mul pow x3 c add c add x2 mul c x3 tan x1