$\left(x^2+2x-3\right)-\left(x+3\right)$

$\int\frac{3x+1}{\left(1+x\right)^{2}}dx$

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

$a^2-24am^2+144m^4x^4$

$|-24-\left(-19\right)|$

$-15\:.\:8\:-\:\left(-\:128\:+\:256\right)\::\:\left(-\:7\:+\:3\right)\:+\:\left(-\:135\:+\:128\right)\:.\:3\:$

$\lim_{p\to0}\left(\frac{p}{1-\left(1-p\right)\cdot e^{2p}}\right)^r$