$\int x^4\left(x^2-3\right)^{\left(\frac{1}{2}\right)}dx$

$\lim_{x\to\infty}\left(\frac{5\:lnx}{x^3-2x^2+x}\right)$

$\int3\sin x\:\left(\cos x-5\right)^3dx$

$\left(\sqrt{6}+\sqrt{2}\right)^2+\left(\sqrt{6}-\sqrt{2}\right)^2$

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

$2x^2+2x+3+x^2-x\:-1$

$\left(15n-\frac{1}{3m}\right)\left(15n+\frac{1}{3m}\right)$