\(\dfrac{25}{26}-\dfrac{15}{26}=\dfrac{5}{13}\\ \dfrac{46}{39}-\dfrac{11}{13}=\dfrac{1}{3}\\ \dfrac{37}{45}-\dfrac{5}{9}=\dfrac{4}{15}\\ 1-\dfrac{1}{3}=\dfrac{2}{3}\)
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