$8m+n^2.8m-3^2$

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

$x^2y+y=x+1$

$\left(\frac{1}{3}\right)^3-3\left(\frac{1}{3}a\right)^2\left(b^2\right)+3\left(\frac{1}{3}a\right)\left(b^2\right)^2$

$\left(3a^2-\frac{2}{5}b^3\right)^2$

$\left(\frac{1}{3}a-3\right)^3$

$4b^2\cdot8b^9$