$\sqrt{\left(x+1\right)\left(-x+1\right)}$
$3x^2-4x-2x^2-4x$
$3-5\left(5n-3\right)$
$\int\frac{3x^2+6x+7}{\left(x^3-9x\right)}dx$
$\int\left(-16e^t\right)dt$
$3x^2+4x-3$
$2z+5+7x+13$
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