693.lean:10:2: proof state
c : ℕ,
h : c = 1
⊢ 1 * c = 1
693.lean:18:2: proof state
b c : ℕ,
h : c = 1
⊢ foo 1 c b = foo 1 1 b
693.lean:26:2: proof state
b c : ℕ,
h : c = 1
⊢ foo b c 0 = foo b 1 0
693.lean:34:2: proof state
b c : ℕ,
h : c = 1
⊢ 2 * c = foo c 1 1