$\left(\frac{1}{3}c^2d\right)\left(\frac{1}{8}c^3d-\frac{3}{4}cd^4+6c^2d^2\right)$

$x\left(512a^6+125k^2k^{16}\right)$

$\frac{dy}{dx}=e^{2y}sen\left(x\right)$

$\left(2n-3z\right)^2$

$\lim_{x\to0}\left(\frac{e^x+x}{\sqrt{x}}\right)$

$8\cdot4+6\cdot3$

$\left(3a-5\right)\left(3a+5\right)^2$