Subject + 轻松
轻松 (qīngsōng) is an adjective meaning "relaxed," "easy," or "effortless." It can describe a carefree mood or a task that requires little effort. It is often contrasted with the difficulty of actually doing something, as in 说起来轻松 meaning "easy to say."
今天的考试很轻松,我半小时就做完了。
Jīntiān de kǎoshì hěn qīngsōng, wǒ bàn xiǎoshí jiù zuò wán le.
Today's exam was very easy; I finished it in half an hour.
周末在家听听音乐,感觉特别轻松。
Zhōumò zài jiā tīng tīng yīnyuè, gǎnjué tèbié qīngsōng.
Listening to music at home on the weekend feels especially relaxing.
你说起来轻松,做起来可没那么容易。
Nǐ shuō qǐlái qīngsōng, zuò qǐlái kě méi nàme róngyì.
It's easy for you to say, but it's not that easy to actually do.