$\frac{dy}{dx}=\frac{\left(1-3y\right)^2}{x}$

$\lim_{x\to0}\left(\ln\left(\cos\left(3x\right)\right)^{\frac{5}{x}}\right)$

$\left(6m-7n\right)^2$

$sin\left(x\right)+\sqrt{3}cos\left(x-1\right)$

$15\left(-2-6\right)$

$\left(x^y+x^{-4}\right)^2$

$\left(xyz+5\right)^2$