$\lim_{x\to0}\left(2\frac{e^x}{x^2}\right)$

$\lim_{n\to\infty}\left(\frac{n^9+n^5}{7n^8+\sqrt[5]{n}}\right)$

$-\frac{1}{3}\left(-\frac{145}{12}+8x\right)\le\left(-\frac{4}{3}+x\right)^2$

$\int_1^2e^{-st}\left(2t-2\right)\:dt$

$\int_0^1xe^{-1}dx$

$\int\frac{2x+1}{\sqrt[4]{x^2+x}}dx$

$4.5ab-2.2ab$