$\left(a-3\right)\left(2a+7\right)$
$\left(\frac{1}{\sin\left(x\right)}+\cot\left(x\right)\right)\cdot\left(\cos\left(x\right)-1\right)$
$\left(5x+3z\right)\left(5x-3z\right)$
$\frac{6x+2}{3x-1}\le5$
$\left(2m-2\right)^3$
$\frac{4x^2+6x}{4x+2}$
$\left(1.74+0.66i\right)^2$
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