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This book explains in detail how to study the essence of mathematics and how to set up a policy for solving problems. By firmly grasping the process leading up to the solution, your thinking ability will be improved, leading to obtaining a passing score in the actual entrance exam. By studying not only by reading the answer but also by being conscious of grasping the key points and points of the problem, the learning effect will be improved, leading to obtaining the one point that makes the difference between passing and failing. These contents are shown in the guidelines of this book. The guidelines are where the true value of the chart formula is most evident.