Answer
$$i^{85}-9i^{76}-8i^{85}+5i^{111}=5i^{111}-7i^{85}-9i^{76}$$
Explanation
| $$ \begin{aligned}i^{85}-9i^{76}-8i^{85}+5i^{111}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}5i^{111}-7i^{85}-9i^{76}\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{i^{85}} -9i^{76} \color{blue}{-8i^{85}} +5i^{111} = 5i^{111} \color{blue}{-7i^{85}} -9i^{76} $$ |
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