$4x^2+4x-5$
$3x^2-7x+5-4+3x-5x^2$
$\int x\left(3x^2\:+\:5x\right)dx$
$x^2+42x+121$
$1-3x\ge x+1$
$\frac{\frac{x}{a}}{b}$
$\int6\cot\left(3x\right)dx$
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