Differensial teńleme

${\frac {du}{dx}}=cu+x^{2}.$
${\frac {d^{2}u}{dx^{2}}}-x{\frac {du}{dx}}+u=0.$
${\frac {d^{2}u}{dx^{2}}}+\omega ^{2}u=0.$
${\frac {du}{dx}}=u^{2}+1.$
$L{\frac {d^{2}u}{dx^{2}}}+g\sin u=0.$
${\frac {\partial u}{\partial t}}+t{\frac {\partial u}{\partial x}}=0.$
${\frac {\partial ^{2}u}{\partial x^{2}}}+{\frac {\partial ^{2}u}{\partial y^{2}}}=0.$
${\frac {\partial u}{\partial t}}=6u{\frac {\partial u}{\partial x}}-{\frac {\partial ^{3}u}{\partial x^{3}}}.$