$\left(-7k+11\right)^2$

$\frac{d}{dx}-5x$

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

$4x^{\frac{5}{3}}-\frac{x^{\frac{5}{3}}}{2}$

$\frac{\left(t+2t^3+t^5\right)}{4}$

$\frac{d}{dx}\left(sqrt\left(\frac{x-4}{x^8+1}\right)\right)$

$\frac{2.sin\left(y\right)\cdot\cos\left(d\right)+\sin\left(y\right)}{2\cdot\cos\left(y\right)\cdot\cos\left(d\right)+\cos\left(y\right)}$