[Concept]
1.
The concepts can be easily understood through neat and detailed concept organization and additional explanations.
2.
It consists of only the essential problems, from problems that can confirm concepts to school exam problems.

3.
It helps you to easily access and solve descriptive questions perfectly.

[Type Power]
1.
The concept section provides concept learning and twin problems so that you can repeatedly study essential problems.
2.
We've analyzed and organized a variety of the latest exam questions by type!
3.
You can become familiar with the types of difficult problems by solving them twice.