$1+\left(2\cdot\left(-7\right)^3\right)+\left(-7\right)^6$
$788+809$
$n^2+9n+8$
$\left(7x^4+2x\right)\left(7x^4-13x\right)$
$11x-23<-3+6x$
$=6z+6z+6z+6z$
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