((121/11 - 2·(18 - 15))^2)^3/25^2 =
=((11 - 2·3)^2)^3/25^2=
=(5^2)^3/25^2=
=5^6/5^4=5^2 = 25
-------------------------------------
4·2^4·(2^6)^2/((1/2·2^4)^2)^3=
=2^2·2^4·2^12/((2^3)^2)^3=
=2^18/(2^6)^3=
=2^18/2^18= 1
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