[tex]4^{47} + 2^{93} + 16^{23} -7*{(2^{4})}^{23}= (2^{2})^{47} + 2^{93} + (2^{4})^{23} - 7*2^{92}= \\ \\ =2^{94} + 2^{93} + 2^{92} - 7*2^{92} \\ \\=2^{93}(2 + 1) - 6* 2^{92} \\ \\ =3*2^{93} - 6*2^{92} \\ \\ = 3*2^{92}(2 - 3) \\ \\ = - 3*2^{92} \\ \\ 4^{47} + 2^{93} + 16^{23} -7*{(2^{4})}^{23}= - 3*2^{92} [/tex]