How would I simplify these expressions? http://i52.tinypic.com/10qf87n.jpg
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2. $\displaystyle \frac{x^2 - 5x + 4}{2x - 8}*\frac{1}{3x^2 - 3x} = \frac{(x - 4)*(x - 1)}{2(x - 4)}*\frac{1}{3x(x - 1)} = $... (Ok, I'm LaTex impaired. Can anyone edit this?!?!) Can you take it from here?
1: 7g / y^2 / 21g^3 = 7g / (21g^3 y^2) = 1 / (3g^2 y^2)
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