a)- 2ab + 3ab - ab =?


b) 5xy + 2xy -7xy =?


c) 17 m2n + 5 m2n =?


d) 55a2 + 35a2 -75a2=?


e) 124b3 + 324b3 -504b3=?


f) 24pq + 36 pq =?


g) 6a3 + 7a3 -13a3 =?


h) 17d2 + 6d2 - 10d2 =?


i) -15ab2 + 15ab2 - 16ab2 =?


J) 0,36 a3 + 0,7 a3 + 0,4 a3 =?


k) 1/2 xy + 3/2 xy + 1/2 xy =?


l) -17 x2 + 17 x2 - 16 x2 - 6 x2 =?
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