$-4\left(a+5\right)\left(a-3\right)$
$-2+3-\left(-4\right)\left(-4\right)$
$\int\:\:e^{cos39t}sen39t\:dt$
$\left(-3\right)^2\cdot\left(-2\right)^2\cdot\left(-1\right)^2$
$\frac{d}{dx}\left(y\left(x^2+49\right)=98\right)$
$m^2+n^2a^2+2mna-4n$
$5.\left(-3-8\right).8\left(-15:5\right)-\left(-\left(9-7\right)-\left(-2-5+6.\left(-3\right)\right)\right)$
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