3/1 разд 19/5 = 15/19
2 1/3 умн 2 1/2= 35/6
15/19+35/6=405/114(наверно сокращ)
405/114-5/6=310/144
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3/1 разд 19/5 = 15/19
2 1/3 умн 2 1/2= 35/6
15/19+35/6=405/114(наверно сокращ)
405/114-5/6=310/144