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https://www.quora.com/How-is-the-size-of-the-observable-universe-calculated/answer/DK-923#comments

Mój komentarz: Observable hyperverse radius was calculated using normal observable universe radius. Hyperverse radius turned out to be twice the radius of Hubble radius ct. You’re using this factor of 2, to calculate normal observable universe radius from Hubble radius on your second page. Consequently, you used known original radius to calculate known original radius.
https://www.researchgate.net/publication/285597928_Fitting_the_Hyperverse_Model_into_the_Friedmann_Equation_Gives_a_Constant_Expansion_Rate_for_the_Universe
Your power raising, multiplication and division by (ct)^3 adds nothing, on the contrary - it obscures your calculation, and I suspect it's intentional.
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On your first page, you substituted Hubble radius to the Schwarzschild radius formula, to get universe mass. You used the same mass to get the same Hubble radius (that you are calling universe age) from the same formula for Schwarzschild radius. Again, you used known, original radius to calculate known, original radius, but this time you called it universe age.