$\left(x^4y+2y^4\right)^2$

$\int18x^2\ln\left(x\right)dx$

$sec\left(2\theta\:\right)=\frac{csc^2\theta\:}{csc^2\theta\:-2}$

$\left(x^2+7x+6\right)\left(x^2+2x+5\right)$

$\lim_{x\to1}\left(\frac{\sqrt{x}}{x-1}-\frac{x^2}{x^2-1}\right)$

$4\left(3j+\left(-4\right)\right)-9$

$5x^4+14x^3+13x+12$