$x2-2x-15=0$
$x^{2}+12=7x$
$\frac { x ^ { 4 } - x ^ { 3 } + x ^ { 2 } - x - 1 } { x - 10 }$
$10x^2+x-24=0$
$3x+5\ge7$
$4x\left(3x+1\right)$
$\frac{5}{6}x+8\ge2x-9$
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