I Can Prove Myself by Writing the Character for 'Explain'

That day, you failed your math exam and were rejected by the Cultivation Academy, becoming the shame of your family. So you were confined to your home, with a pile of math worksheets set before you. You couldn't solve a single problem. As usual, you wrote the word "solve" beneath the first question, then got ready to take a nap. But just then, a vicious fire-type demon beast suddenly appeared and charged toward the family disciples training outside. Women and children were nearby, too. You immediately stepped forward, because you knew you were the only one among the family disciples who had secretly learned water-based techniques. No one else could deal with it. You saved everyone, and an elder who had just arrived saw what happened. The elder promptly decided you no longer had to waste time studying math and allowed you to cultivate at home. You had proved your abilities, but refused the elder's kind offer and buried yourself in the ocean of mathematics once more. Because you wanted to write a few more instances of "solve."