$sen^4y-cos^4y$
$\int5dv$
$3q=18$
$-3+2-4+2+4+1$
$\lim49\left(\frac{1}{\sqrt{x}-7}-\frac{14}{x-49}\right)$
$x^3\cdot\frac{x^{-2}}{x^5}$
$\cot\left(3x\right)\sin\left(3x\right)$
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