Proszę o wykonanie i wytłumaczenie przekształcania wzorów: Pilne!!!

[latex]B = frac{Mo* I }{2r} /*2r[/latex] [latex]B*2r = MoI / :2B[/latex] [latex]r = frac{MoI}{2B} [/latex] [latex]W = frac{1}{2} CU^2/* 2 [/latex] [latex]2W = CU^2/:C[/latex] [latex]U^2 = frac{2W}{C} [/latex] [latex]U = sqrt{ frac{2W}{C} } [/latex] [latex]T = 2 pi sqrt{ frac{m}{k} } /^2[/latex] [latex]T^2 = 4 pi ^2 frac{m}{k} /* k[/latex] [latex]T^2 k = 4 pi ^2m/:4 pi ^2[/latex] [latex]m = frac{T^2k}{4 pi ^2} [/latex] [latex]f = frac{foV}{V- V_x} /*V- V_x[/latex] [latex]f (V-V_x) = foV /:f[/latex] [latex]V-V_x = frac{foV}{f} [/latex] [latex]V_x = V - frac{foV}{f} [/latex] [latex]V_x = frac{Vf- foV}{f} [/latex] [latex]V_x = frac{V(f - fo)}{f} [/latex]