[flex-computed.html]
  [Property flex value 'calc(10 + (sign(20cqw - 10px) * 5)) calc(10 + (sign(20cqw - 10px) * 5)) 1px']
    expected: FAIL

  [Property flex value '1 1 calc(10px + (sign(20cqw - 10px) * 5px))']
    expected: FAIL