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

$\:\frac{5}{6}\left(\frac{5}{6}x+12y\right)-\frac{1}{4}\left(2x-12y\right)$

$\left(y\right)^'=\left(y-1\right)\cdot\:\left(y-2\right)$

$\lim_{x\to11}\left(\frac{x^2-121}{77-4x-x^2}\right)$

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

$4x^2-56$

$x^2-3^2$