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Question
Compute the following:
`[(a, b),(-b, a)] + [(a, b),(b, a)]`
Sum
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Solution
`[(a, b),(-b, a)] + [(a, b),(b, a)]`
= `[(a + a, b + b),(-b + b, a + a)]`
= `[(2a, 2b),(0, 2a)]`
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