$x^2+x-30>0$
$\frac{3^n+4^{n+1}}{5^n}$
$81m^{4}-144n^{6}$
$\frac{2}{x-2}-\frac{1}{x+2}=\frac{3}{x^2-4}$
$\left(x^2-5\right)^5$
$x+12=126$
$\int2\sec^3\left(9x\right)dx$
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