$=1+\cos2\theta$

$18\left(3x-2\right)^5$

$\frac{dy}{dx}+xy=e^{-x^2}\cdot y^{-3}$

$\left(8x+3y+4m-6n\right)^2$

$1-\frac{2}{3}\left(x-3\right)=2-\frac{1}{4}\left(3x-4\right)$

$\lim_{x\to0}\left(\frac{\sqrt{x^2+\left(100x^2-1\right)^2}}{x}\right)$

$\int\frac{\sin\left(x\right)}{3}dx$