Bỏ ngoặc rồi tính: (-14 - 135 + 48)- (-14 + 48)

Bo ngoac roi tinh :
a, ( -14 - 135 + 48 ) - ( -14 + 48 )
b, ( -46 - 16 ) - ( 78 - 16 - 46 )
Tinh :
a, ( -17 ) + ( -987 ) + ( -13 ) + 987
b, ( -281 ) + ( -599 ) + 281 + 602
MINH CAN GAP !!!!!!!
CAM ON.