$2x+1\cdot5x-3$

$\frac{x^6-64}{x+2}$

$\lim_{x\to\infty}\left(\frac{4x+3}{\sqrt{x^2-9}}\right)$

$\int\:\frac{x^5}{\sqrt[5]{9+x^2}}dx$

$-7\left(-4+2\right)+5-\left(-3.8\right)$

$\lim_{x\to0}\left(\frac{3x^3+2x^2}{x^3-2x^2+5}\right)$

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