$2.4\cdot5$

$\left(2xy+5y\right)^{-1}\frac{dy}{dx}=-2$

$\int\frac{1}{u^2\left(u^2+1\right)}du$

$\int\left(x^4\left(sqrt\left(4+x^5\right)\right)\right)dx$

$47,02+31,48$

$\csc\left(x\right)\sin\left(x\right)\sec\left(x\right)=\frac{1}{\cos\left(x\right)}$

$64x^2-48x+9$