- 3,4 × ( 4 - 1 / 6 ) - ( - 1) × [ ( 4 - 1 / 6 ) × 3,4 ] = 0
= - 34 / 10 × [ ( 4 × 6 ) / 6 - 1 / 6 ] + 1 × [ ( 4 × 6 ) / 6 - 1 / 6 ] × 34 / 10 =
= - 34 / 10 × ( 24 / 6 - 1 / 6 ) + ( 24 / 6 - 1 / 6 ) × 34 / 10 =
= - 34 / 10 × 23 / 6 + 23 / 6 × 34 / 10 =
= 34 / 10 × 23 / 6 × ( - 1 + 1 ) =
= 34 / 10 × 23 / 6 × 0 = 0