$43.36+7.45$
$7^2\cdot7^2\cdot2^2$
$8-\left|4+\left(2-5\right)\cdot2-6\cdot3+\left(6-2\right)\right|\cdot\left(-1\right)+5\cdot\left(-3+2\right)$
$1002\cdot998$
$-\frac{48}{\left(-20+8.4\right)}-4.\left(2.4+5\right)$
$5\left(x\:+\:2\right)$
$x^2-5x+54$
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