$\frac{1}{2}x-1=5$
$\lim_{x\to\infty}\:\frac{1^n-1}{1^n+1}$
$\frac{dy}{dx}+y=e^{7x}$
$6v^2-26v+20$
$\frac{816}{16}$
$-90-30w$
$\frac{m^4n^2-2m^3n^3-3m^2n^4}{m^2n^2}$
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