$-11x^3+19x^2+12$

$\left(\frac{1}{2}m+\frac{1}{6}n\right)\left(\frac{1}{2}m-\frac{1}{6}n\right)$

$\left(16u\right)\frac{3}{4}$

$\int x^2\ln\left(\left|x\right|\right)dx$

$\left(xy\right)^4$

$\sqrt{27x}+\sqrt{108x}+8\sqrt{3x}$

$2.\:\left(3t\:+7\right)\:\left(3t\:+\:2\right)\:\cdot$