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

$\left(a^2b^2+100\right)\left(a^2b^2-100\right)$

$3a-5b-8a-b-a-2b-5b-6a$

$\int\left(36e^{4x}\sqrt{3+e^{4x}}\right)\:dx$

$\lim_{x\to0}\lim_{x\to0}\left(\frac{x-\left(e^x-1\right)}{x\left(e^x-1\right)}\right)$

$\int2^x\csc^2\left(2^x\right)dx$

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