Fundamental knowledge of mathematics is necessary for daily life.

The answer is obvious.

The answer is self-evident.

Planning is important as a prerequisite for success.

In mathematics, an axiom is not a fact to be proven, but a basic premise that is considered self-evident.

It is important to learn the basic grammar of Japanese.

I love mathematics.

His actions proved his innocence.

When he learned that fact, he was surprised.

He hired a lawyer to prove his innocence.