$\lim_{x\to0}\left(1+x\right)^{\left(\frac{1}{x}\right)+9}$

$3\left(-2\right)-2\left\{5\left[\left(3-5\right)\right]\:\right\}$

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

$2x^2-16x$

$cot\left(x+\frac{\pi\:\:}{4}\right)=\frac{1-tanx}{1+tanx}$

$-81x^2+72xy-16y^2$

$\int_{-\infty}^{-1}x^{\frac{-11}{5}}dx$