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)：
$x= {3+\sqrt{5}\over2} , y={-1+\sqrt{5}\over2}$ のとき
$x^2-xy-3$ の値を求めよ。

問題文全文(内容文)：
因数分解せよ
$a^2b^2 - 2abd -c^2 +d^2$

2023中央大学付属高等学校

問題文全文(内容文)：
$\frac{1}{x} - \frac{1}{y} = -5$
$\frac{(x-1)(y+1)+1}{xy} = ?$

日本女子大学附属高等学校

問題文全文(内容文)：
次の式を因数分解しなさい.

①$x^2+\dfrac{1}{4}+x$

②$x+y-xy-1$

③$(x+y)^2-2x-2y+1$

④$a^3+b^2c-a^2c-ab^2$

⑤$9x^2-1-6xy+2y$