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1 □ 12 □ 13 □ 14 □ 15 □ ⋯□ 131=132 \large 1 \, \square \, \dfrac12 \, \square \, \dfrac13 \, \square \, \dfrac14 \, \square \,\dfrac15 \, \square \, \cdots \square \, \dfrac1{31} =\dfrac1{32} 1□21□31□41□51□⋯□311=321
There are 230 2^{30} 230 ways in which we can fill the squares with the mathematical operators + ++ and −-−.
How many ways would make the equation true?
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