how can i revise this sentence using more formal word choices.

I spend tons of my time on my English class because writing and researching stuff is hard.

I take a considerable amount of time on my English course, because it is difficult to write and research topics.

Even more concisely:

I spend a great deal of time on my English coursework because research and writing are difficult.

Explain your changes?

To revise the sentence using more formal word choices, you can consider the following:

"I invest a considerable amount of my time in my English class as composing prose and conducting extensive research require substantial effort."

Explanation:
1. "Tons of my time" can be replaced with "a considerable amount of my time" to sound more formal. This emphasizes the significance of the time you dedicate to your English class.
2. "Because" can be substituted with "as" to maintain the cause-effect relationship between spending time and the difficulty of writing and researching.
3. "Stuff" can be replaced with more specific terms like "composing prose" and "conducting extensive research" to demonstrate a more formal vocabulary choice.
4. Finally, "is hard" can be changed to "require substantial effort" to convey a more sophisticated, formal tone while indicating that writing and researching are challenges that demand considerable dedication and persistence.