問題文全文(内容文)：
$\sqrt{14}(\sqrt{28}+4)(\sqrt{14} - \sqrt 8)$

専修大学松戸高等学校

問題文全文(内容文)：
$4(x^2+2xy+y^2) - (2x+y+1)^2$を因数分解せよ。

2021早稲田大学 本庄高等学院

問題文全文(内容文)：
Let's enjoy oriental mathematics for just a little while.
You will discover a cute world from mathematics.
Everyone in the world should love and be good at mathematics.

We are introducing the entrance exam questions for Japanese high schools.
It's an important issue for you to understand the basics of mathematics.
Would you like to solve this math problem and check out our commentary?

問題文全文(内容文)：
$a+\frac{1}{a+2} = 4$
$(a+2)^2+\frac{1}{(a+2)^2}=?$

問題文全文(内容文)：
(a+2b)²-3(a+2b)+2(a+b)-2(1-b)を因数分解しなさい