calcErrors.lean:7:30-7:33: error: type mismatch
  rfl
has type
  ?m = ?m : Prop
but is expected to have type
  b + b = 0 + c + b : Prop
calcErrors.lean:13:8-13:29: error: invalid 'calc' step, left-hand side is
  0 + c + b : Nat
but previous right-hand side is
  b + b : Nat
calcErrors.lean:24:8-24:11: error: invalid 'calc' step, relation expected
  p a
calcErrors.lean:31:8-31:13: error: invalid 'calc' step, failed to synthesize `Trans` instance
  Trans p p ?m
Additional diagnostic information may be available using the `set_option diagnostics true` command.
calcErrors.lean:41:7-41:12: error: invalid 'calc' step, left-hand side is
  γ : Sort u_1
but previous right-hand side is
  b : β
calcErrors.lean:61:18-61:19: error: unexpected token '['; expected command