$cos\left(-t\right)=\cos\left(t\right)$

$\lim_{n\to\infty}\left(\frac{3^{n+2}}{\pi^n}\right)$

$\lim_{x\to\pi}\frac{\sin\left(x\right)}{x\cdot\left(x-\pi\right)}$

$\lim_{n\to\infty}\left(n^{\left(\frac{1}{n}\right)}\right)$

$6m^3\cdot3m$

$4a\:^{16}+4a^8b+b^2$

$\frac{5\left(x-3\right)}{3\:}<\frac{3\left(6-2x\right)}{2}$