$-\left(-13\right).\left(-7+8-9\right)-\left(5-\left(10+8-3\right)\right):\left(-5\right)$
$\left[-21+16-\left(-15+3\right)\right]$
$2a^2+3a-10$
$\left(x+1\right)^3\:-\:3x^2\:-\:1\cdot\frac{\left(x+1\right)}{\left(x+2\right)}$
$242\cdot3$
$-5a^2\left(-a\right)$
$-4x^3+x^2+16x-4$
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