My daughter brought this home last night and told her mom it is just "part of a primary school 4th grade math quiz". Can you help me on this, mummy?

https://ws3.sinaimg.cn/large/006tNc79gy1fmilgl2e3cj30ci0h8jrc.jpg

Piece of cake, honey. My wife smiled.

And after a rough night, she sent it to me.

Get it done and show our girl what her parents are capable of. She ordered.

Piece of cake, honey. I smiled.

And that was 4 hours ago. Now I'm still struglling, going nowhere, and I'm look kind of like this:

https://ws2.sinaimg.cn/large/006tNc79gy1fmilgl5zf6j309u07nweg.jpg

Mighty Steemit, help me out!

(BTW, this is a primary school question, no fancy stuff like trigonometric etc. here)

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我女儿昨晚把这玩意儿带回家，说是道小学四年级的数学测验题。“能教教我怎么做么，妈妈？”

https://ws3.sinaimg.cn/large/006tNc79gy1fmilgl2e3cj30ci0h8jrc.jpg

老婆微笑着回答：“没问题，宝贝。分分钟搞定。”

然后她就差不多熬了个通宵。

今天早上，蓬头垢面的老婆命令我：

解决它！不能让孩子知道她的爸妈这么没用！

我微笑着回答：“没问题，宝贝。分分钟搞定。”

那已经是四个小时以前的事了。现在我正满头包，看上去是这样的：

https://ws2.sinaimg.cn/large/006tNc79gy1fmilgl5zf6j309u07nweg.jpg

万能的Steemit，帮帮忙吧！

（对了，这是小学数学，表整三角函数之类的东东）