$\frac{15x^2+43x+34}{3x+5}$
$x^2+210-5$
$\frac{\left(2x+67\right)}{\left(x-9\right)\left(x+8\right)}$
$\left(+7\right)+\left(-7\right)+\left(+45\right)+\left(+8\right)+\left(-42\right)$
$6^2-4^2$
$\int x\cdot\sqrt[3]{x+9}$
$2x-7+6.\:\left(x-1\right)$
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