$-3518-3$

$\int\frac{2x-5}{\left(x^2+4x+4\right)}dx$

$\frac{\csc\left(x\right)-\sec\left(x\right)}{1-\cot\left(x\right)}$

$\left(r+7\right)\left(r-7\right)$

$\frac{5x^3-2x-8}{x+1}$

$\left[\sqrt[2^{18}]{\left[\left(x^4\right)^{64^2}\right]^8}.x^{16^4}\right]^{\frac{4}{3}}$

$x^2-6x^2+12x-8$