$25^4-40x^2+16$

$\frac{3x^2-30x}{4x}.\frac{x-10}{x^2-20x+100}.\frac{3x}{2x}$

$2\cdot2\cdot4^5$

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

$cot\left(x\right)=\frac{1+cot^2\left(x\right)}{csc\left(x\right)sec\left(x\right)}$

$\sin\left(t\right)\sec\left(t\right)$

$2\int\left(\frac{x^2}{x+1}\right)dx$