3(a - 4 ) -5 (2a-3) - (5a - 11 ) 15( x +2y-1 )-3 (3x -4) + 7 ( 4y - 8 ) -20(5a-2b - 4 ) +10 (3a -4b - 8) - 8(a-2b +1 )

3(a - 4 ) -5 (2a-3) - (5a - 11 ) 3a-12-10a+15-5a+11 -12a+14 15( x +2y-1 )-3 (3x -4) + 7 ( 4y - 8 ) 15x+10y-15-9x+12+28y-56 6x+38y-83 -20(5a-2b - 4 ) +10 (3a -4b - 8) - 8(a-2b +1 ) -100a+40b+80+30a-40b-80-8a+16b-8 -138a+16b-8