手(て)がけるto handle, to manage, to deal with, to work with, to have experience with, to rear, to look after

自分(じぶん)が手(て)がけた生徒(せいと)と別(わか)れるのが悲(かな)しいです。

I feel sad to part with the students I have worked with. {to handle, to manage, to deal with, to work with, to have experience with, to rear, to look after}

僕(ぼく)は、初(はじ)めて手(て)がける仕事(しごと)に悪戦苦闘(あくせんくとう)しています。

I am struggling with the job I am handling for the first time. {to handle, to manage, to deal with, to work with, to have experience with, to rear, to look after}

シンガーソングライターは作詞(さくし)も作曲(さっきょく)も自分(じぶん)で手(て)がけている。

The singer-songwriter handles both writing the lyrics and composing the music themselves. {to handle, to manage, to deal with, to work with, to have experience with, to rear, to look after}

幾(いく)つもの研究(けんきゅう)を同時(どうじ)に手(て)がけるとは…彼(かれ)の頭(あたま)はパンクしないのだろうか？

Working on so many research projects at once... I wonder if his brain doesn't blow a fuse? {to handle, to manage, to deal with, to work with, to have experience with, to rear, to look after}

苦労(くろう)を重(かさ)ねて手(て)がけた自分(じぶん)のプロジェクトを発表(はっぴょう)できる日(ひ)が待(ま)ちきれません。

I can't wait for the day when I can present the project I've been working tirelessly on and handling. {to handle, to manage, to deal with, to work with, to have experience with, to rear, to look after}