$\lim_{x\to-1}\left(\frac{x-2}{x+4}\right)$

$\int_{-1}^1\left(\frac{x}{\sqrt{4x^4}\:-10}\right)dx$

$\int\frac{1}{\sqrt{x^2-484}}dx$

$2^{3x+1}=128$

$\frac{dy}{dx}=2\sin\left(x\right)+\sin\left(2x\right)$

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

$x^2+2+49$