Salut!
[tex]\begin{aligned}
( {2}^{7} )^{8} \cdot {2}^{2} \div {2}^{50} - {4}^{2} & =240 \\ {2}^{56} \cdot {2}^{2} \div {2}^{50} - {2}^{4} & =240 \\ {2}^{58} \div {2}^{50} - {2}^{4} & =240 \\ {2}^{8} - {2}^4& =240 \\ {2}^4 \cdot {2}^{4} - {2}^{4} & =240 \\ ( {2}^{4} - 1) - {2}^{4}&=240 \\ 15 \cdot 16& = 240
\end{aligned}[/tex]
-Luke48
