\(A=\dfrac{1-\dfrac{1}{\sqrt{49}}+\dfrac{1}{49}-\dfrac{1}{\left(7\sqrt{7}\right)^2}}{\dfrac{\sqrt{64}}{2}-\dfrac{4}{9}+\left(\dfrac{2}{7}\right)^2-\dfrac{4}{343}}\)
\(A=\dfrac{1-\dfrac{1}{7}+\dfrac{1}{49}-\dfrac{1}{\left(7.7\right)^2}}{\dfrac{8}{2}-\dfrac{4}{9}+\dfrac{4}{49}-\dfrac{4}{343}}\)
\(A=\dfrac{1-\dfrac{1}{7}+\dfrac{1}{49}-\dfrac{1}{2401}}{\dfrac{8}{2}-\dfrac{4}{9}+\dfrac{4}{49}-\dfrac{4}{343}}\)
\(A=\dfrac{\dfrac{6}{7}+\dfrac{1}{49}-\dfrac{1}{2401}}{\dfrac{32}{9}+\dfrac{4}{49}-\dfrac{4}{343}}\)
\(A=\dfrac{\dfrac{43}{49}-\dfrac{1}{2401}}{\dfrac{1604}{441}-\dfrac{4}{343}}\)
\(A=\dfrac{\dfrac{2106}{2401}}{3,625526401}\)
\(A=\dfrac{2106}{2401}:3,625526401\)
\(A=\dfrac{9477}{39172}\)
