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Convert the following mixed fractions into improper (top-heavy) fractions, or vice versa.

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     ${\\var{a1}\\frac{\\var{a2}}{\\var{a3}}}$

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     ${\\var{b1}\\frac{\\var{b2}}{\\var{b3}}}$

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     ${\\var{c1}\\frac{\\var{c2}}{\\var{c3}}}$

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     $\\frac{\\var{top4}}{\\var{bottom4}}$ = [[0]][[1]]

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     $\\frac{\\var{top5}}{\\var{bottom5}}$ = [[0]][[1]]

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