$\frac{3\left(x-1\right)}{x^2-4x-5}-\frac{2}{x-5}$

$\left(5m^5\right)\left(5m^5\right)$

$2\left(b+3\right)$

$\tan\left(x\right)+\cot\left(x\right)=\frac{\cos\left(x\right)}{\cos\left(x\right)}$

$16x^2+48xy^2+36y^4$

$\frac{\sqrt[5]{\left(x^2-1\right)}^3}{x^3-1}$

$\cos^2\left(60\right)-1.5\cos\left(60\right)=1$