$\lim_{x\to0}\left(\frac{x^2}{x^2-1}\right)$

$\frac{d}{dx}\left(ln\left(ln\left(2\right)\right)\right)$

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

$\frac{dy}{dx}=\frac{\left(x^2+4-x\right)^{\frac{1}{2}}-x}{2}$

$4ab\left(a-b\right)$

$\int_0^3\left(\frac{1}{\left(x^2-4\right)^2}\right)dx$

$76m-9+2$