$\frac{dr}{dg}=\frac{sen\:g\:+\:e^{2r}\:seng}{3e^r+e^rcosg}$

$\int_{\frac{\sqrt{2}}{3}}^{\frac{2}{3}}\left(\frac{1}{x^4\sqrt{9x^2-1}}\right)dx$

$xydy-\left(x^2+y^2\right)dx=0$

$6x^2+11x+3=0$

$3x^2+5x-4-3x+7$

$\int4x^3\sqrt{x^4+2}dx$

$\frac{\left(18vz^4-22v^7z^4\right)}{\left(-3v^3z^2\right)}$