$-526-392$

$2cos\left(2x\right)sin\left(x\right)=sqrt\left(2\right)cos\left(2x\right)$

$\left(x+2\right)\left(x^4-2x^3+4\right)$

$\frac{x^2-4x+4}{x^2+7}$

$\left(4a-3\right)\left(4a+1\right)$

$\int_{-\infty}^{\pi}\left(\frac{x}{x-1}\right)dx$

$\frac{dy}{dx}=\left(x+y\right)\ln\left(x+y\right)-1$