$-3+4+5-6-9+1-2$
$\left(2x\:\cdot\:px\right)\cdot\left(px\:\cdot\:x\right)$
$2x-1\ge-x-3$
$8^2+2\cdot86+6^2$
$x-7<2x-5$
$-\left|-10\right|+\left|-4\left(-3\right)+5\right|$
$( n ^ { 2 } - 1 ) ( n ^ { 2 } + 7 ) ( n ^ { 4 } - 6 x ^ { 2 } - 7 )$
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