$20a^{x+1}-54a^{x-1}$
$2x-4<x+3$
$4x-2>8x-2$
$\int_{-1}^1\left(3+4x\right)dx$
$\frac{2h^2}{2h}$
$y=\frac{\sqrt{1-7x}\left(x^2+1\right)^2}{x^2+4x+5}$
$3\left(-x+2\right)$
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