$m^2+8m-16$
$64y^2b^4+34yb^2+16$
$\lim_{x\to-2}\left(3x^2+5x-1\right)$
$\left(-5\right)-\left(-25\right)$
$-91-1$
$x\left(3x+3\right)\le\left(2x+1\right)^2$
$\sqrt{16-4\sin\left(x\right)}$
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