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Question
Simplify: `"a"("a" + 1/"a") - "b"("b" - 1/"b") -"c"("c" + 1/"c")`
Solution
`"a"("a" + 1/"a") - "b"("b" - 1/"b") -"c"("c" + 1/"c")`
= a2 + 1 - b2 + 1 - c2 - 1
= a2 - b2 - c2 + 1
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