$5a^2-3ab+2ab^2$

$\lim_{x\to-2}\left(\frac{8}{4-x^2}-\frac{1}{2+x}\right)$

$\left(-5\right)+\left(-3\right)\cdot\left(+4\right)$

$\lim_{x\to0}\left(\frac{\left(7sin\left(4t\right)ln\left(4t\right)\right)}{1}\right)$

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

$-2xy=10$

$\int_0^2\left(x^2+2x+1\right)^8\left(x+1\right)dx$