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en/13.4.14.md
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| + | ### Statement | ||
| + | |||
| + | $13.4.14.$ [Insert the problem statement] | ||
| + | |||
| + | ### Solution | ||
| + | |||
| + | $e= MC$ | ||
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| + | |||
| + | #### Answer | ||
| + | |||
| + | [Insert a concise answer or boxed result] | ||
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| ### Statement | |||
| $13.4.14.$ [Insert the problem statement] | |||
| ### Solution | |||
| $e= MC$ | |||
| #### Answer | |||
| [Insert a concise answer or boxed result] | |||