trolls2 hw8 item6

PART A:

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@DIV{QωR@Sup{2};4}
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PART B:

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PART C:

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@DIV{Qωμ@Sub{0};2πR@Sup{2}}(@RT{R@Sup{2}+x@Sup{2}}+@DIV{x@Sup{2};@RT{R@Sup{2}+x@Sup{2}}}-2x)
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PART D:

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