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Find the inverse of `A = [(-27,-12,4),(2,1,0),(-7,-3,1)]`
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Box 1: Enter each element of the matrix as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
`[(1,0,-4),(-2,1,8),(1,3,-3)]`