$\frac{dy}{dx}-\frac{y}{x}=3x$
$5n-\left(-2n\right)+6$
$\frac{\cos\left(x\right)}{1+\sin\left(z\right)}+\tan\left(x\right)=\sec\left(x\right)$
$x^2+2<1-2x$
$\int4x^2send\left(x\right)x$
$-6x-7y+13;\:x=2;y=3$
$-\left(-cb^7\right)^3$
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