5/6ab+3b^2/14a^3
Rewrite to see what we have
5 + 3b^2
6ab 14a^3
Find a common denominator:
6ab = 2*3ab
14a^3 = 2*7a*a^2 2a is common. Then get the leftovers.
2*a*3*7*b*a^2 or 42a^3b
5(14a^3) + 3b^2(6ab) = 70a^3 + 18a b^3
42a^3b 42a^3b
= 2a(35a^2) + 2a(9b^3) = 35a^2 + 9b^3
42a^3b 21a^2b