[tex]a = ( {2}^{16} )^{4} = {2}^{64} [/tex]
[tex]b = ( {16}^{2} )^{7} =( ( {2}^{4} )^{2}) ^{7} = {2}^{56} [/tex]
[tex]c = ( {8}^{8}) {}^{3} = (( {2}^{3} ) {}^{8} ) {}^{3} = {2}^{72} [/tex]
[tex]u = ( {4}^{9} ) {}^{4} = (( {2}^{2} ) {}^{9} ) {}^{4} = {2}^{72} [/tex]
[tex]w = ( {128}^{2} ) {}^{4} = (( {2}^{7} ) {}^{2} ) {}^{4} = {2}^{56} [/tex]
[tex]x = ( {64}^{5} ) {}^{3} = (( {2}^{6} ) {}^{5} ) {}^{3} = {2}^{90} [/tex]
[tex]y = ( {16}^{2} ) {}^{8} = (( {2}^{4} ) {}^{2} ) {}^{8} = {2}^{64} [/tex]
[tex]z = ( {8}^{4} ) {}^{7} = (( {2}^{3} ) {}^{4} ) {}^{7} = {2}^{84} [/tex]
tzn.
a = y
b = w
c = u
;)