Image Transcription:
An 8-panel Phoebe Teaching Joey meme.
The first panel is Phoebe from Friends saying "Russia".
The second panel is Joey from the same show replying with "Russia".
The third panel is Phoebe saying "has invaded".
The fourth panel is Joey repeating back "has invaded".
The fifth panel is Phoebe saying "Ukraine".
The sixth panel is Joey repeating back "Ukraine".
The seventh panel is Phoebe saying the completed phrase "Russia has invaded Ukraine".
The final panel shows Joey proudly proclaiming "NATO just started a proxy war".
Buddy I enjoyed differential equations as much as the next guy, but differential formulae are not a great way to communicate any concepts in a text forum, not even concepts that are modeled by differential equations.