$-2\int\frac{1}{\left(x+1\right)}dx$
$7\left(x+9\right)$
$x3\:+\:3x^2\:x$
$\lim_{x\to1\:}\left(\frac{ln\left(-3+4x\right)}{x-1}\right)$
$x+y=\frac{dy}{dx}$
$\frac{3}{x+2}+\frac{5}{x-2}$
$\lim_{x\to0}\frac{\sqrt[3]{1+x^2}-\sqrt[4]{1-2x}}{x^2}$
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