$-\frac{3}{5}m+\frac{1}{4}m-\frac{1}{2}$
$x^3-\frac{x^5}{8}+\frac{x^7}{27}-\frac{x^9}{64}$
$3x^2-4x^4-9x\left(x-1+6x^4+3x^2\right)$
$\frac{x^6+3}{x^6}$
$-25\:\cdot\:-17$
$y=\frac{1}{2}x^2-4x+6;x=-8$
$3\left(-3k+5\right)$
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