$\lim_{y\to0}\frac{1-\cos\left(y\right)}{e^{8y}-1}$
$\frac{16^4-1}{2x+1}$
$3a^3b+a^2b^2-2ab^3-5a^3b+ab^3$
$x^2-6x+60^2$
$\left(x^{5+f}-4\right)\left(x^{5+f}-6\right)$
$\int\sin u\cdot ydu$
$\left(-1\right)^n\:\frac{x^n}{n+3}$
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