$\lim_{x\to4}\left(\frac{|x|}{x}\right)$
$\lim_{x\to0}\left(\frac{sinx}{1}\right)$
$x\:cos\:w\:+\:y\:sen\:w\:-\:p\:=\:0$
$a^24a+3$
$\frac{4x^2+22x-41}{x+7}$
$5\left(-2w-3\right)+2w$
$\left(-xy^2\right)\cdot\left(3x^2y\right)$
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