= \(\dfrac{1}{4}+\dfrac{1}{9}=\dfrac{9}{36}+\dfrac{4}{36}=\dfrac{13}{36}\)
\(\dfrac{1}{2^2}+\dfrac{1}{3^2}=\dfrac{1}{4}+\dfrac{1}{9}=\dfrac{9+4}{36}=\dfrac{13}{36}\)
\(\dfrac{1}{2^2}+\dfrac{1}{3^2}\)
= \(\dfrac{1}{4}+\dfrac{1}{9}\)
= \(\dfrac{9}{36}+\dfrac{4}{36}\)
= \(\dfrac{13}{36}\)