$6x\left(6x-y\right)-2+\left(y\right)^4$

$\frac{-\frac{3}{8}c^3d^5}{\frac{3}{4}d^x}$

$\cos\left(x\right)=-\sin\left(x\right)$

$\frac{dy}{dx}=y^2\left(1-8x\right)$

$\left(9x^2\:y+8x^3\:y^2\:z-5\:\right)-\:\left(-9x^2\:y^3-3y\right)$

$sec^2x\left(1+6cscx\right)-6cscx\left(cotx\right)\left(tanx\right)$

$-6a^8b^718a^4b^9$