$\lim_{x\to0}\left(\frac{16^x-1}{x}\right)$

$\int x^3\sqrt{100x^2+1}dx$

$\lim_{x\to3}\left(\frac{x^2+2x-15}{x^2-5x+6}\right)$

$\sqrt{2}\cdot\left(5\cdot\left(-3\right)\right)$

$\left(x-4\right)\left(y-4\right)=2016$

$\lim_{x\to3}\:\:\frac{\left(x+1\right)}{\left(x-1\right)^2}$

$\lim x\to1\left[x-1\right]$