$ex=t+1$
$\left(x^2+5x-14\right)^2$
$3e+7-e\:2e+10+2e-3$
$5\left(-2\right)-1$
$3tan^2\left(\theta\right)-3=0$
$\left(-42-19+55\right)-\left(-41\right)$
$4n-2+7n=20$
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