How do I translate "Carla studies the most." as in the following sentence.

Maria studies more than Jim but Carla studies the most.

I understand comparatives, so

Maria studies more than Jim. is _{Maria estudia más que Jim.}

But the only formula that I know for Superlatives, is only in relation to adjectives.

For example

Mateo es el estudiante más inteligente. or Mateo es el más inteligente.

but in relation to verbs I'm confused.

For example

She sings the best.

She studies the most.

She plays the worse.

What is more confusing is that Google Translate gives the same Spanish comparative translation for both the English comparative and superlative translation.

Example

She studies more. _{Ella estudia más.}

She studies the most. _{Ella estudia más.}

UPDATE:

What about nouns? What is the superlative formula when dealing with nouns?

How would I translate the following

She won the most money.

She has the best book.