望遠 ぼうえん きょう級数 きゅうすうじゃなかったです
bōenkyōkyū sūja nakattadesu

Noun
Desu Copula

The polite, past negative form of 望遠鏡級数

1. Wasn't a telescopic series.; Wasn't a series of telescopes.

Past/Perfective
Negative
Polite
Casual Register
Mathematics