$\left(d^{10}\right)^{-6}$

$\int\frac{1}{\left(19-18x-x^2\right)^{\frac{3}{2}}}dx$

$3x^6\left(x^4-8x\right)$

$6m-9n+21nx-14mx$

$\lim_{x\to\infty}\left(1+\frac{3}{\sqrt{x}}\right)\sqrt{x}$

$\left(3m^2+7n^3\right)\left(9m^4-21m^2n^3+49n^6\right)$

$\left(x^2y^3\right)\left(x^3y^4z^2\right)$