$\left(9a^{-4}b^{\frac{2}{5}}+5x^{-5}b^{-4}\right)^3$

$\left(\frac{5}{8}x^3-\frac{2}{3}x+\frac{5}{4}x^2\right)\cdot\left(\frac{4}{3}x+\frac{7}{3}\right)$

$\left(6m^4\right).\left(2m\right)$

$52-23+310$

$2\left(-1\right)^2-2\left(-1\right)\:$

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

$\left(x^2-2\right)x\left(x^2+2\right)$