$\left(-9.6\right)-\left(-1.3\right)$
$\left(4-6\right)\cdot5$
$16x^2+16x+4$
$\int\frac{\left(2x+7\right)}{\left(x^2+2x+5\right)}dx$
$3x^2+x-3$
$\left(4a+7\right)^2$
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