$-5-4+8+6q+8q-1+5q+3+9q$
$log\left(y-6\right)-log\left(y-4\right)$
$\frac{\sin\left(b\right)+\cos\left(b\right)\sin\left(b\right)^2}{\sin\left(b\right)^3}=\frac{1}{1-\cos b}$
$\int\frac{y^2-25}{y^9}dy$
$5\cdot3-2\cdot6$
$3x^2\:cuando\:x=-1$
$6^3\cdot8\cdot10$
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