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

Noun
Desu Copula

The polite, past negative form of 偏微分方程式

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

Past/Perfective
Negative
Polite
Terminal Form
Mathematics