$\left(3x+1\right)\cdot\left(3x+1\right)$
$a^{3}+a^{2}+a+1$
$7r+14$
$\frac{dy}{dx}\cot x-y$
$7x^2-12x=4$
$\frac{6x}{3x-2}-\frac{4}{3x-2}$
$sin^2\left(x\right)+\frac{2}{csc\left(x\right)}+1$
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