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x∧0=1
x∧(-1)= 1/x
x∧m x∧n = x∧m+n
x∧m/x∧n = x∧m-n
(x∧m)∧n = x∧mn
(xy)∧n = x∧ny∧n
(x/y)∧n = x∧n/y∧n
x∧(-n )= 1/x∧n