2 lines
157 B
Text
2 lines
157 B
Text
@[defaultInstance high] instance : HPow R Nat R where hPow a _ := a
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example (x y : Nat) : (x + y) ^ 3 = x ^ 3 + y ^ 3 + 3 * (x * y ^ 2 + x ^ 2 * y) := sorry
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