$4r^2+112r-92=0$
$6x+8<3x+4$
$\int\sec\left(x-1\right)^2dx$
$3\cdot y-8\cdot z+9^2$
$\left(16-4+2^5\right)$
$7\left(3x+2\right)-5\left(4x-3\right)=4\left(x-2\right)+1$
$\left(-1\right)\left(-3\right)\left(-3\right)\left(-1\right)$
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