望遠 ぼうえん きょう級数 きゅうすうじゃないです
bōenkyōkyū sūjanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 望遠鏡級数

1. It's not a telescopic series.; It's not a series of telescopes.

Negative
Polite
Casual Register
Mathematics