$5a^2b-10ab^2+5a^2b^2$

$\left(\frac{4y^{3}z^{\frac{2}{3}}}{x^{\frac{1}{2}}}\right)^{2}\left(\frac{x^{-3}y^{6}}{8z^{4}}\right)^{\frac{1}{3}}$

$-8+-237$

$\left(\frac{2}{x^2}\right)^3$

$\left(a-b-c\right)^3$

$\left(16x+10y-250\right)^2$

$\frac{9^{2}}{25}-\frac{ab}{5}+\frac{1}{5}$