$\lim_{x\to\infty}\frac{\cos\left(3x\right)}{x}-\sqrt[x]{100}$

$\lim_{x\to\infty}\left(\frac{2+x-3x^2}{5-x^2+3x^3}\right)$

$7t+10-3\left(2t+3\right)$

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

$5t^2+100t+605$

$8\left(n+1\right)\left(2n+1\right)$

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