$34ax^2+51a^2y-8ay^2$
$4\tan^2x+12\tan x-27=0$
$\frac{2x+3}{4}<2$
$\left(x^3-1\right)^{5x^4}$
$28x^2-x-2$
$\int_1^{\infty}\left(\frac{1}{x+7}\right)dx$
$\int\frac{x+1}{\left(x-1\right)\left(x^2+x-1\right)}dx$
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