$n^2+6n-9$
$14+-1+-30$
$-136-147$
$e^{2\ln\left(1+x^2\right)}$
$\int\left(2x+4\right)\left(x^2+4x+4\right)^5dx$
$\left(-308\right)^2$
$-1-\sqrt{3}i$
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