$2sec^2xtanx-2csc^2x\cot\left(x\right)$

$\log_{12}\left(w\right)-\log_{12}\left(4\right)=2$

$36k^2-60k+25k$

$\frac{x^4}{16}+\frac{1}{2}+\frac{1}{x^4}$

$\frac{dy}{dx}\left(y^3=x^3+11x+13\right)$

$\left(x^2+x-20\right)-\left(x+5\right)$

$\int\frac{cot^{-1}\sqrt{x}}{\sqrt{x}}dx$