$-5x+9+7x$
$7,24+9,1$
$29-\left(-9\right)$
$-x^2+17x+30$
$2+4t^{\frac{1}{3}}$
$\left(2x^3-4x^2\right)\left(5x+2\right)$
$x^2+11x-8$
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