YOU SAID:

Regardless whatever I had to study, it was very much.

INTO JAPANESE

勉強しなければならないことが何であれ、それはとても大変でした。

BACK INTO ENGLISH

Whatever I had to study, it was very hard.

INTO JAPANESE

何を勉強するにしても、とても大変でした。

BACK INTO ENGLISH

No matter what I studied, it was very difficult.

INTO JAPANESE

何を勉強してもとても難しかったです。

BACK INTO ENGLISH

It was very difficult for me to study anything.

INTO JAPANESE

私にとって何かを勉強するのはとても難しかったです。

BACK INTO ENGLISH

It was very difficult for me to study anything.