Equation Icon  [ ] [ ( ) ] QSr = [@g]r2 + @2g,(@g)2 r3 + @3g, @2g (@g) ,(@g)3 r4 + [ ( ) ( )2 ( ) 2 4] + @4g, @3g (@g) , @2g , @2g (@g) ,(@g) r5 + ...,