$\left(6-8\right)\:\left(4+5-6-3\right)\:\left(9-13\right)\:\left(5-12\right)+\left(-10+1-6\right)$

$3^{-2}\cdot\left(7-4\right)^2+\left(7+4\right)^2$

$\cos^2\left(x\right)=\sin^2\left(x\right)\cdot\cos^2\left(x\right)+\cos^5\left(x\right)$

$-5m+2m-3m$

$cot^2\left(x\right)csc\left(x\right)+csc\left(x\right)=csc^3\left(x\right)$

$\lim_{x\to3}\left(\frac{x^3}{e^x-x-1}\right)$

$\int\frac{x}{\sqrt[2]{2x-1}}dx$