$12m^2n^3\:+\:8\:m^4\:n^2\:-\:4mn$

$f\left(x\right)=\frac{x^{5}\left(x-5\right)^{6}}{\left(x^{2}+5\right)^{8}}$

$-4\left(3c^2+4c\right)$

$\left(-\sqrt{64}-\sqrt[3]{64}\right)\::\:\sqrt{4}$

$7y+4-3\left(y-6\right)$

$\left(u^{\frac{4}{5}}+v^{\frac{1}{5}}\right)^5$

$( - 5 ) ^ { 4 } - ( 12 - 8 ) + 20 - 4 + 5$