omega
h2 :
  ∑ x ∈ Finset.filter (fun x => Even x) (Finset.range 1319), 1 / (↑x + 1) +
      ∑ x ∈ Finset.filter (fun x => ¬Even x) (Finset.range 1319), 1 / (↑x + 1) =
    ∑ x ∈ Finset.range 1319, 1 / (↑x + 1)
a b : ℕ
hab : 2 * a + 1 = 2 * b + 1
⊢ a = b
no goals