$\int_2^{\infty}\left(\frac{2}{\left(x+3\right)ln\left(x+3\right)}\right)dx$

$\lim_{x\to0}\left(1-3sin\left(x\right)\right)^{\frac{2}{x}}$

$5+2+7+9+3+2+1$

$\left(12az\:-\:11b\right)^2$

$\frac{dy}{dx}2ycos^3\left(3x\right)+sin\left(3x\right)=0$

$\frac{12x+18}{6}$

$\frac{14x^2-12+22x}{7x-3}34$