InterviewSolution
`{:[(,3N,-4),(,N,-n)]:}``{:[(,2n+n,5-n),(,n,-n)]:}``{:[(,3^(n),(-4)^(n)),(,1^(n),(-1)^(n))]:}``{:[(,2n+1,-4),(,n,-(2n-1))]:}`
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