$5-\left(-3\right)+\left(-4\right)$
$\left(5y-2\right)\left(y+2\right)$
$-3n^2-4n^3-1$
$\lim_{x\to0}\left(\frac{sen\left(4x\right)}{cos\left(7x\right)}\right)$
$\lim_{x\to-\frac{1}{2}}\left(\frac{6\left(-\frac{1}{2}\right)-1}{-\frac{1}{2}}\right)$
$\log\left(-20\right)$
$-16x^2-32x+9$
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