$4xy-2x^2-x^2=0$
$\frac{1}{2}\frac{du}{dx}+\frac{2}{x}u=\frac{1}{x^2}$
$6x^2\:+\:4x\:-3y\:+31=0$
$\int\:\frac{x^2-1}{x+3}dx$
$25x^2-10x+8$
$2y\:cos\left(x\right)dx\:+\:3\:sin\left(x\right)\:dy\:=0$
$\lim_{x\to0}\left(e^{\frac{5}{x}}-6x\right)^{\frac{x}{2}}$
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