$-17-\left(-32\right)-\left|-43\right|$
$\frac{7x+3}{x^{2}+3x-4}$
$\left(\frac{-12}{x}\right)^2$
$8x-8=-4x+16$
$3\cdot3^2\cdot3^{-3}\cdot3^5\cdot3^5$
$2\cdot\left|3\cdot2\right|$
$\left(-5-b\right)^{-\frac{2}{3}}=\frac{1}{\left(-5\cdotb\right)^{\frac{2}{3}}}$
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