\[\boxed{\text{444\ (444).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{а)}\ 2^{60} = \left( 2^{2} \right)^{30} = (4)^{30}\]
\[\textbf{б)}\ 2^{60} = \left( 2^{3} \right)^{20} = 8^{20}\]
\[\textbf{в)}\ 2^{60} = \left( 2^{4} \right)^{15} = 16^{15}\]
\[\textbf{г)}\ 2^{60} = \left( 2^{5} \right)^{12} = 32^{12}\ \]