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I'll be sending a photo of my problem
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I'll be sending a photo of my problem

User Seekay
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\Sigma^6_(j=1)9j\text{ = 9}\cdot1\text{ + 9}\cdot2\text{ +9}\cdot3\text{ +9}\cdot4\text{ + 9}\cdot5\text{ + 9}\cdot6\text{ = 189}

Another way of solving this is the following:


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User Sebastiano Merlino
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