Question 251541
35a^2b^2, 5a^5b^5, 14a^2b^5
35=1*5*7
5=1*5
14=1*2*7 
LCM=1*2*5*7=70
A^2,A^5,A^2=A^5
B^2,B^5,B^5=B^5
70A^5B^5 ans.