$\frac{d}{dx}e^{3y^2-3}$

$\frac{tan\:x+tan\:y}{cot\:x+cot\:y}-tan\:x\cdot\:\:\:tan\:y$

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

$\left(u+23\right)\left(u-1\right)$

$\frac{\cos\left(x\right)\cdot\sin^2\left(x\right)+\cos^3\left(x\right)}{\sin\left(x\right)}$

$\frac{\left(n^2-5n+6\right)}{\left(n^2-5n-3\right)}$

$125x^3+8x^3$