[acos-asin-atan-atan2-serialize.html]
  ['rotate(atan(tan(90deg)))' as a specified value should serialize as 'rotate(calc(90deg))'.]
    expected: FAIL

  ['rotate(calc(atan(tan(90deg))))' as a specified value should serialize as 'rotate(calc(90deg))'.]
    expected: FAIL

  ['rotate(atan(tan(-90deg)))' as a specified value should serialize as 'rotate(calc(-90deg))'.]
    expected: FAIL

  ['rotate(calc(atan(tan(-90deg))))' as a specified value should serialize as 'rotate(calc(-90deg))'.]
    expected: FAIL