Integrals Tutorial

I hadn’t seen an integral for nearly 20 years until last week when my niece called for help. Here I am posting my solutions to the problems she sent me. The integrals seem quite typical. That’s why I hope these solutions show the methodology to solve such integrals. I kept the transitions very simple, so although the  explanations (wherever I’ve added any) are in Bulgarian, you can still figure out what I’ve had in mind.

Problems

Solutions