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Problem5
This is a math problem. If you can solve it, please comment your solution into the comment field or link your solution page URL in the comment field. I would check it.
The prepared solution file is linked on the below page (math-pro*.pdf). Since this original solution was already posted into @takashishinzato on Instagram, if you want to know about it, please check Instagram. If you can support this educational activity, please purchase it.
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