$+7-2+4-6+2-37+3-4+2\left(-30\right)$
$-9\:x\:7$
$7=\frac{3x}{4}-2$
$x\left(\frac{dy}{dx}\right)-15y^2=0$
$2\cos\left(\frac{1}{2}x\right)=-\sqrt{3}$
$y2+16+64$
$x^2-\frac{19}{4}x+\frac{361}{4}=89$
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