2^2m-1*16*8^m-1+(-4^m)*8^m

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2^2m-1*16*8^m-1+(-4^m)*8^m2^2m-1*16*8^m-1+(-4^m)*8^m2^2m-1*16*8^m-1+(-4^m)*8^m2^(2m-1)*2^4*2^3(m-1)-

2^2m-1*16*8^m-1+(-4^m)*8^m
2^2m-1*16*8^m-1+(-4^m)*8^m

2^2m-1*16*8^m-1+(-4^m)*8^m
2^(2m-1)*2^4*2^3(m-1)-2^2m*2^3m
=2^(2m-1+4+3m-3)-2^(2m+3m)
=2^5m-2^5m
=0

2^(2m-1)*16*8^(m-1)+(-4^m)*8^m
=2^(2m-1)*2^4*(2^3)^(m-1)-4^m*(2^3)^m
=2^(2m-1)*2^4*2^[3(m-1)]-(2^2)^m*2^(3m)
=2^(2m-1)*2^4*2^(3m-3)-2^(2m)*2^(3m)
=2^[(2m-1)+4+(3m-3)]-2^(2m+3m)
=2^(5m)-2^(5m)
=0.