holds (forall (a : Q), (b : Q). abs a < 4 or abs b < 4)
holds (exists (a: N), (b : N), (c : N). (0 < a < b < c) and (a^2 + b^2 == c^2))
holds (exists (a : N, b : N, c : N).  (0 < a < b < c) and (a^2 + b^2 == c^2))
holds (exists (x:N). exists (y:N). exists (z:N). (0 < x < y < z) and (x^2 + y^2 == z^2))