$5a+5b$

$\frac{d}{dx}\left(ln\left(\sqrt{\frac{2+x^2}{x^2}}\right)-\frac{\arctan\left(x\right)}{x^2}\right)$

$\left(2x^2+23\right)\left(2x+3\right)$

$\cos^2ydx+\left(1+e^{-x}\right)\sin\left(y\right)dy=0$

$\frac{25}{4}x^2+\frac{20}{3}xy+1\frac{6}{9}y^2$

$x^{2}+6x+5>0$

$x+12<3x-8$