How to add and subtract rational expressions with unlike denominators?

One way of adding an subtracting rational expressions with unlike denominators is by multiplying the denominators of the two expressions, and then continue solving and at the end simplify.

Another way is by finding the least common denominator.

Is there a picture of a graph or whatever that goes along with this?

Well if you have 20 bats you probably want 20 balls? you don’t have enough context to answer the question.