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= 20-9
= 11
m) 15 ( (-3)/(-5) )+5
= 15 (-3/5) +5
=(45/5)+5
=-9+5
=4
n) 165(-1/5) -12(-3/9)+12
=-165/5 -(-36/9)
=-33+4+12
=-17
0) -5+6+5(-4/2)+12
=1+10+12
=23