$\frac{d^2y}{dx^2}xy+y^2$
$\left(y^2+11\right)\left(y^2+15\right)$
$\left(6.89\cdot10^4\right)+\left(9.24\cdot10^5\right)$
$\frac{e^x}{e^{2x}}$
$2x^2-10x-12x+60$
$a_n=2^n$
$\frac{sinx\:cosx}{cotx}=1-cos^2x$
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