omit 'to'

[aysaa]

Hello,

1) All I want is provide for my children.

2) The only thing I want to have is be able to protect you from him.

3) All I will do is leave here.

Could you please tell me whether we can omit 'to' or not?

Thank you...

[emsr2d2]

Hello,

1) All I want is provide for my children.
No.

2) The only thing I want to have is be able to protect you from him.
No (and the sentence is not grammatically correct in other ways).

3) All I will do is leave here.
This is OK.

Could you please tell me whether we can omit 'to' or not?

Thank you...

See above.