$\frac{2x+11}{\left(x+2\right)\left(x-1\right)}$

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

$\log_{x-5}\left(x^2+8x-5\right)=\log_{x-5}\left(3x^2-15\right)$

$\lim_{x\to\frac{\pi}{4}}\left(\sqrt{1+\sin\left(\frac{\pi}{2}\tan\left(x\right)\right)}\right)$

$4l+l^2+3l^4$

$\frac{-49+\sqrt{-147}}{7}$

$\frac{1}{24}\left(7+e^{4x}\right)^6$