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)：
$x^2-xy-2y^2-x+2y$
因数分解しなさい

二松学舎大学附属高等学校

問題文全文(内容文)：
【$69^2$】の面白い計算方法紹介動画です

問題文全文(内容文)：
$x+y=1$ , $x^2+y^2=5$
$\frac{1}{x} + \frac{1}{y} = $

問題文全文(内容文)：
(91)$(3x-8)(16x+9)$
(92)$(25x-16)(4x+5)$
(93)$3(a+b)(b+c)(c+a)$
(94)$24xyz$
(95)$(x+y+2)(x-y-2)(x+y-2)(x-y+2)$