$1-x\ge1$
$-8+7\left(-2\right)$
$3\cos^2\left(x\right)=\cos\left(\:x\right)$
$42x^2+30y^2-10=0$
$3x\ge9$
$\frac{dy}{dx}\left(\arctan\left(x^2y\right)-x-xy^2\right)$
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