a|-120|-9 x (8-2)^2 b.|-189|-8 x (100-99)^2
=120-9 x 6^2 =189-8 x 1
=111 x 36 =188
=3996
c.|-340|-8 x (200-1)^0 d. 6-15/ 3^2 x 18 -9
=340-8 x 1 =6-5/ 3 x 9
=332 =6-15
=-9
e. 5 -15/ 10 x (3-8) f. 36-15/ 21 x 12^2 - 21
=5-3/ 2 x -5 =36-5/ 7 x 144 - 21
=5-(-7) =36-720/7-21
=12 =15-720/7
=-615/7