$\left(\frac{1}{\infty}e^{\infty}-e^{\infty}+\frac{1}{\infty}\right)-\left(\frac{1}{1}e-e+\frac{1}{1}\right)$

$0.5\:\left(2x\:-\:0.1\right)^2$

$\frac{d}{dx}2\cos-1\sqrt{x}$

$\int_{5.3}^{6.8}\left(-7e^{t}-9t^{2}\right)dt$

$xy'+y=e^x\:\:\:$

$\frac{5x^3-16x+60}{x+3}$

$\lim_{x\to\infty}\left(\frac{x^2-1}{\:1-e^x}\right)$