( 2/( 2 - V7 ) ) + ( 3 / ( 2 + V 7 )) + ( V 7 / 3 ) = ( 2•3•( 2 + V7 ) + 3•3•( 2 - V 7 ) + V7•( 4 - 7 ) / ( 3•( 4 - 7 )) = ( 12 + 6V7 + 18 - 9V7 - 3V7 ) / ( - 9 ) = ( 30 - 6V7 ) / ( - 9 ) = ( 3•( 10 - 2V7 ) ( 3•( -3 )) = ( 10 - 2V7 ) /( -3 ) = - 3 1/3 + 2/3V7