-The value of 2Ab × (the second power of a, B + the second power of 3AB - 1)

-The value of 2Ab × (the second power of a, B + the second power of 3AB - 1)

-2Ab × (a to the second power B + 3AB to the second power - 1)
=-The second power of 2Ab × A is B + (- 2Ab) × 3AB - (- 2Ab) × 1
=-2a³b²-6a²b³+2ab