Formal:
* Я стараюсь (Ya starayus'): This is the most common and neutral way to say "I am trying".
* Я прилагаю усилия (Ya prilagayu usilia): This means "I am making an effort" and is more formal than "Я стараюсь".
Informal:
* Я пытаюсь (Ya pytayus'): This is a more casual way to say "I am trying" and is often used in everyday conversation.
* Я делаю всё возможное (Ya delayu vsyo vozmozhnoe): This means "I am doing everything I can" and is a more emphatic way of saying "I am trying".
Other options:
* Я борюсь (Ya bor'yus'): This means "I am struggling" and can be used to express that you are facing difficulties in your efforts.
* Я работаю над этим (Ya rabotayu nad etim): This means "I am working on it" and is a good way to say that you are trying to achieve something.
The best way to choose the right phrase depends on the specific situation. Consider the level of formality, the intensity of your effort, and the specific task you are trying to accomplish.