i3 : sum C
16
o3 = R
o3 : R-module, free, degrees {0..1, 3:1, 6:2, 4:3, 4}
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i4 : degrees oo
o4 = {{0}, {1}, {1}, {1}, {1}, {2}, {2}, {2}, {2}, {2}, {2}, {3}, {3}, {3},
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{3}, {4}}
o4 : List
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