$\int11xe^{-2x}dx$

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

$\int\left(5x^2+3x\right)^6\:\left(10x+3\right)\:dx$

$\lim_{x\to0}\left(\frac{\tan3\left(x+y\right)-\tan\left(3x\right)}{y}\right)$

$3x+4\ge2\left(x-7\right)$

$\left(2+\sqrt{3}\right)+\left(2-\sqrt{3}\right)+1$

$\frac{yx^4}{4xy^3}$