$\int\frac{7}{x^2+7}dx$
$\left(6-w\right)\left(2u+1\right)$
$2a-3b+5b-2c-4a+3c$
$\left(2a+1\right)\left(2a+1\right)=\left(2a+1\right)^2$
$4\left(5x-1\right)-8x+11$
$x^2+\:11x\:-\:60$
$\frac{d}{dx}\:y\:=\:xy$
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