けを らない
hikeo toranai

i-Adjective
Idiomatic Expression

1. not losing out (to); holding one's own (against); comparing favorably (with); being a fair match (for)

数学 すうがくにかけては かれはクラスの だれにも けを らない。
sūgakuni kaketewa karewa kurasuno darenimo hikeo toranai.
When it comes to mathematics, he is second to none in his class.
Other forms: