$\int x\log\left(8x\right)dx$

$10a\left(2a+8b\right)-6a\left(10a+2b\right)-8b\left(6b+10a\right)$

$\frac{xsenx}{2-2cosx}$

$-7\left(-5+b\right)$

$\int\left(\left(x-25\right)^{-2}\right)dx$

$\frac{d^2}{dx^2}\left(x^{2\:}+y^2=1\right)$

$\left(8n^2+3n^7\right)\left(8n^2+3n^7\right)$