$\left(x^3+2x^2-5x+7\right)-\left(4x^3-5x^2+3\right)$
$5a^2-4a+3;\:a=-1;\:y=2$
$4x+10\le-2x-8$
$d=c+19$
$x^2+28x+0$
$7+2k+5k-3$
$x-2=3\sec\left(\theta\right)$
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