Please respond as soon as possible.

I learned the theory of commutative rings at university.

This metal has very high malleability.

Aika is my best friend.

We should always remember the power of Kannon in difficult times.

He said, 'Even if you die in the evening, it's okay if you ask the way in the morning,' teaching me the importance of living each day to the fullest.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.