Accepting gifts and donations from haraam wealth

He told the students to pay money towards classroom renovations and he gives them grades accordingly

He pilfered some money and does not know how much, and he cannot repay it. What should he do?

Invitation to a dinner given by a riba-based bank

He took some money unlawfully. How should he repent?

What should be done with interest?

Can he accept money that comes from the lottery company?

What should a person who accumulated his wealth from haraam sources do?

Ruling on money earned from haraam sources

He took some money by force from a man and he wants to repent