$\lim_{h\to0}\left(\frac{\frac{\left(x+h\right)+2}{\left(x+h\right)^2+1}+\frac{x+2}{x+1}}{h}\right)$

$3\left(2y+1\right)\left(x^2-2\right)$

$\int\frac{x^3+3}{x^2+1}dx$

$\int_0^{ln2}\left(\frac{e^x+e^{-x}}{2}\right)dx$

$\log x-2=\frac{1}{2}\left(\log18+\log8-2\:\log25\right)$

$dy=-e^{-3x}dx$

$\left(\frac{1}{2n^6}\right)^{-6}$