$3\:w+7=19$
$\frac{\tan\left(x\right)}{\sin\left(x\right)}+\csc\left(x\right)=\sec\left(x\right)\cdot\csc^2\left(x\right)$
$\frac{15a+20ab}{-5a}$
$\int\frac{1}{\left(3x+1\right)^2}dx$
$\left(x^a-y^{2a}\right)^2$
$4-3tanx=-7$
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