$\left(x^2-3\right)^4$

$\int\frac{6x^2+2}{3x^2+2x}dx$

$\lim\:_{x\to\:\pi\:}\left(\frac{5\:sin^2\left(t\right)}{1+cos\:x}\right)$

$8a^2-24ab+18b^2$

$\lim_{x\to n^2}\left(\frac{5\left(4n^3+1\right)}{\sqrt{10n^4+10n}}\right)$

$18abx-27ab^2y+9a^2bz-3ab$

$\int11x\sin\left(3x\right)dx$