$x+2<3x-8$
$\left(\frac{3}{2}a^2-\frac{5}{4}b^3\right)^2$
$\frac{34t^{18}}{72t^{15}}$
$.\:\left(a^{x+1}\:-\:2b^{x-1}\right)\left(\:2b^{x-1}\:+\:a^{x+1}\right)\:$
$7x+4-5x-8$
$9t^2-36t+144$
$2176-149$
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