An interesting concept is based on a special method where you have to use two functions by multiplying them together. When you are dealing with equations you should focus on differentiation, integration, and various simplification methods. Speaking of definite integration by parts, you will be able to find the answers and seek similar questions based on your objectives. There is also integration by parts examples that are based on the word problems and the formulas. The best solution is to reverse-engineer the equations based on the solutions. Take your time to explore and the integral calculus challenges will become easier.