微分 びぶん方程 ほうてい しきじゃありませんでした
bibunhōteishikijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 微分方程式

1. Was not a differential equation.; It wasn't a differential equation.

Past/Perfective
Negative
Polite
Terminal Form
Mathematics