$\left(xy+x\right)dx-\left(x^2y^2+x^2-y^2+1\right)dy=0$
$sin\left(cos^{-1}u-tan^{-1}v\right)$
$9\left(x+2y\right)$
$m^2-121n^2$
$\left(\sqrt{5x}+2\sqrt{7y}\right)$
$\frac{d}{dx}\left(4x^3y^3+\frac{1}{y}-\frac{3}{x}=seny\right)$
$x^2-10x=-5$
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