I Can Prove Myself by Writing an Explanation

That day, you failed the math test and were not admitted to the training academy, which became a shame to the family. So, you're stuck at home, with a pile of math papers in front of you, and you can't do a single question. As usual, you wrote a solution below the first question and prepared to take a nap. But at this moment, a fierce fire-type monster suddenly appeared and rushed towards the family members who were training outside, with women and children beside them. You stepped forward immediately because you knew that you were the only one in the family who had secretly learned the water system, and no one else could deal with it. You saved everyone, and you were seen by the elder who came over. The elder immediately decided not to let you study mathematics hard, and allowed you to practice at home. You proved your ability, but you rejected the elder's kindness and continued to swim in the ocean of mathematics. Because, you want to write a few more solutions.