X1 OR ( X2 AND X3 AND X4 AND X5 ) OR X6 X1 OR ( X2 AND( X3 AND X4 ) AND X5 ) OR X6
X1 OR ( X2 AND X3 AND X4 AND X5 ) OR X6 X1 OR ( X2 AND( X3 AND X4 ) AND X5 ) OR X6