Answer
The required the solution ${{\left( a+2b \right)}^{6}}={{a}^{6}}+12{{a}^{5}}b+60{{a}^{4}}{{b}^{2}}+160{{a}^{3}}{{b}^{3}}+240{{a}^{2}}{{b}^{4}}+192a{{b}^{5}}+64{{b}^{6}}$
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