$3x^2-14x-15$
$\left(10x\right)+\left(4y\right)+\left(5x\right)+\left(4y\right)$
$7x-28=42$
$\left(7+s\right)\left(7-s\right)$
$\frac{4x^2-5x-7}{2x^2+2}$
$\int3\left(lnx\right)^2dx$
$a^2+a^2b^2+\frac{b^2}{4}$
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