$-x+4<3x-11$
$\frac{1-a^9}{1-a^2}$
$4x-6x^2+x-2$
$\left(x^2+1\right)\left(1-2x\right)$
$\int\arccos mxdx$
$4\left(5b+4\right)+6$
$2x^2-22x+48=0$
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