$\lim_{x\to3}\frac{x^2+x-6}{x^2-9}$
$\int e^x\left(1+2e^x\right)^4dx$
$\frac{x^2+6x+8}{x+2}$
$\left(6x\right)\left(-2x\right)$
$6x^2+8x-3=5x$
$4\cdot\left(8-11\right)-6\cdot\left(7-9\right)$
$-7y-y+8y$
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