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

$\int\frac{1}{t^3\sqrt{t^2-4}}dt$

$\left(x^2-xy-4y^2\right)dx+x^2dy=0$

$\int_{-3}^0\left(\frac{\left(x^3+x^2+1\right)}{x-1}\right)dx$

$\lim_{x\to-1}\left(\frac{x-1}{x}\right)$

$\frac{\sin\left(2a\right)+\sin\left(4a\right)}{\cos\left(2a\right)+\cos\left(4a\right)}=\tan\left(3a\right)$

$373,744-6,58$