$3x\left(8p\:-\:a\:+\:4\right)$
$9-\left(240+220\right)\cdot\left(10-19\right)$
$\frac{12y^7}{2y^4}$
$2\left(p+q\right)+q$
$11x^2\:x\:x^2$
$3.94\cdot10^7$
$\left[\left(-8\right)+5\cdot2-4:\left(-2\right)\right]\cdot\left(-1\right)$
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