$\left(2\right)-\left(-9\right)-\left(-8\right)-\left(-8\right)$
$\frac{4x^4-3x^2+5x-7}{2x^2+x-3}$
$12m^2-17m-14$
$7-7-7-7-8-8-8-9-9$
$x^2+2x^2+9$
$7x+13=2\left(2x-5\right)+3x+23$
$0.250+1.25$
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