$2x\:+7x+3\:0$
$sec\:x\:\frac{dy}{dx}=e^y$
$\sqrt{y^2+1dx}-xydy=0$
$2\left(p+q\right)+q$
$sin^2\left(x\right)+\frac{1}{2}+cos\left(2x\right)=1$
$\frac{dy}{dx}=\frac{2x\:y^3}{\left(1+x^2\right)^{0.5}}\:\:$
$a-b-a-a+b+a-2b$
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