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

$\int\left(4+x^2\right)^{\frac{3}{2}}x^3dx$

$\frac{16x^4-32x^2+16}{x^4}$

$18n^2+33m-6$

$\left(+2\right).\left|7+\left(-12\right):\left(-5\right)\right|$

$\lim_{x\to\infty}\left(x+\sqrt[3]{x^2-x^3+1}\right)$

$ln\left(\frac{1+x}{1-x}\right)$