$\frac{3}{2}x^2-x$
$\lim_{t\to3}\left(\frac{\sqrt{5t^2+4t+7}-3t+1}{t^3-2t^2-3t}\right)$
$\left(-2\right)\left(5\left(-4\right)+18\right)-\left(+2\right)\left(-2\right)$
$\left(9\right)\left(-8\right)\left(4\right)\left(-9\right)$
$b^4-2b^3+b^2+3b-10$
$3pq-pq+\frac{3pq}{5}$
$b+3b+5b+b+b$
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