$41.35-13.92$
$-4xy+\left(-7xy\right)+\left(15xy\right)+\left(19xy\right)$
$\int x^7e^{5x}dx$
$\frac{\left(2-5x\right)}{\left(2+2x\right)}$
$\left(-2\right)^4+4\left(-2\right)^3-4\left(-2\right)^2+4$
$1.34\cdot10^{10}\cdot1.88\cdot\:10^6\:$
$16x^2-16x-5$
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