$-20+\left(8-7\right)-6$
$2x^2+2x-3;\:x=-1$
$\frac{1}{y-1}=2x^3+c$
$4=-16t^2$
$\frac{1}{2}\left(4x+14\right)<\:3x-6$
$\left(4m-5\right)^3$
$-8\:sin\:x\:=\:-2\sqrt{5}$
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