$9x^2-25<0$
$\ln\left(4x^2+4\right)-\ln4x^2=4$
$4z^2-100$
$\frac{dy}{dx}=2xy-8x$
$\int\frac{2x^2+4x+10}{2\sqrt{x}}dx$
$\frac{8^3}{2^3}$
$1x^2-8x+17$
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