(2m+1 / 2m-1 - 1-2m-1 / 2m+1) / 4m / 10m-5= все записано дробью / - обозначает деление (х / у в квадрате - 1 / у) / 1 / у + 1 / у =

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(2m+1 / 2m-1 - 1-2m-1 / 2m+1) / 4m / 10m-5 =
((2m+1)/(2m-1) - (1-2m-1)/(2m+1)) / 4m / 10m-5 =
[((2m+1)(2m+1) - (1-2m-1)(2m-1)) / (2m-1)(2m+1)] / 4m / 10m-5 =
[(4m^2 + 4m + 1 - (2m^2 - 1)) / (4m^2 - 1)] / 4m / 10m-5 =
[(4m^2 + 4m + 1 - 2m^2 + 1) / (4m^2 - 1)] / 4m / 10m-5 =
[(2m^2 + 4m + 2) / (4m^2 - 1)] / 4m / 10m-5 =
(2m^2 + 4m + 2) / (4m^2 - 1) 1 / 4m / (1 / 10m - 5) =
(2m^2 + 4m + 2) / (4m^2 - 1) 1 / 4m / 1 / 10m - 5 =
(2m^2 + 4m + 2) / (4m^2 - 1) 1 / 4m (10m - 5) =
(2m^2 + 4m + 2) / (4m^2 - 1) (10m - 5) / 4m =
5(2m^2 + 4m + 2) / 4m (10m - 5) / (4m^2 - 1) =
5(2m^2 + 4m + 2) / (4m) * (10m - 5) / (2^2m^2 - 1^2) =
5(2m^2 + 4m + 2)(10m - 5) / 4m(2m + 1)(2m - 1) =
5(40m^3 - 100m^2 + 28m^2 + 60m - 10m - 25) / 4m(2m - 1)(2m + 1) =
5(40m^3 - 72m^2 + 50m - 25) / 4m(2m - 1)(2m + 1) =
(200m^3 - 360m^2 + 250m - 125) / 4m(2m - 1)(2m + 1)