Add [[1,-1,1,2],[2,1,-3,1],[-1,-5,9,4]]

Problem

[[1,−1,1,2],[2,1,−3,1],[−1,−5,9,4]]

Solution

1. Identify the task as the representation of a single matrix, as only one matrix was provided in the input.

2. Observe that the input consists of three rows and four columns.

3. Format the elements into a standard matrix structure using the provided values.

Final Answer

[[1,−1,1,2],[2,1,−3,1],[−1,−5,9,4]]=[[1,−1,1,2],[2,1,−3,1],[−1,−5,9,4]]

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