b) 2 3/5.( -2/3)- 2 1/3. ( -2/3) + ( 2/3) ^2

b) 235.−23−213.−23+232

= 235.−23−213.−23+−232

= −23.235−213−23

=−23.2+35−2−13−23

=−23.2−2+35−13−23

=−23.35−1

= −23.−25

=415