⊦ ~128 ≤ b2i(by) ∧ b2i(by) ≤ 127
~128 ≤ b2i(by) ∧ b2i(by) ≤ 127, b2i(by) < 0, 0 ≤ i, 0 < i, i + b2i(by) < 0, 128 ≤ i ⊦
Used terms: by