$85,3\:por\:25$
$\:\:\:\:x^2+3x+3=0\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:$
$58^2$
$x\cdot\frac{dy}{dx}+y^2=0$
$x^2<9$
$x^2-18x=19$
$12z+9x+5z+3x$
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