$-a^2-a^2$
$\left(-619.9\right)^2$
$\sqrt{\frac{27x^3}{16}}$
$\int4x^3\left(x^4-8\right)^{-\frac{1}{2}}dx$
$3x\ge9$
$34ax^2+51a^2y-8ay^2$
$4y^2+16y+21=0$
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