$\int\left(x+6\right)^{11}dx$

$\lim\:_{x\to\:\:0}\left(e^{\frac{3}{x}\ln\:\left(1+\frac{x}{2}\right)}\right)$

$6\left(-3z+5\right)+7$

$\left(2x-1\right)\cdot dx+\left(5y+7\right)\cdot dy=0$

$\left(6w+2\right)\left(6w-2\right)$

$\left(x+\sqrt{5}\right)\left(x-\sqrt{5}\right)$

$\frac{x}{x^2-9}-\frac{1}{x-3}$