$\left(2x^{-1}\right)^2\left(2^2\right)$
$x^2+12x+6^2$
$2x^2+5=4x$
$\int_0^1\left(1-t^2\right)^{-\frac{1}{2}}dx$
$3x^2+25x^2+36x-36$
$x^2-14x+49>0$
$\sqrt{x}+7=4$
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