∂ ρ ∂ x π ∂ x θ y d y / d y d y d x y y d x {\displaystyle {\partial ^{\rho } \over \partial x_{\pi }\partial x_{\theta }}ydy/dy{dy \over dx}{\operatorname {y} \!y \over \operatorname {d} \!x}} e arcsin {\displaystyle \arcsin }