$\lim_{t\to0}\:\frac{5sin\left(4t^9\right)}{-4t}$
$m-5.3+1.2-9.1$
$5.\left(-8\right)=-40$
$\left(ab\right)\left(4ab+12ab^2\right)$
$1+\left(-50\right)+\left(-35\right)$
$5w+3-6x-8$
$-4b^2+80b$
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