What do you use to remove any grouping symbols in math

When we remove those parentheses, the sign of every term

within the parentheses changes.

Problem 2. Remove the parentheses.

a) p + (q - r + s) = p + q - r + s

b) p - (q - r + s) = p - q + r - s

In each of the following problems, remove the parentheses, then simplify

by adding the numbers.

For example,

(x - 3) - (y - 4) = x - 3 - y + 4 = x - y + 1.

The sign preceding (x - 3) is understood to be +. Therefore the signs within those parentheses do not change.

But the sign preceding (y - 4) is minus. Therefore, y changes to - y, and - 4 changes to + 4.

Finally, it is the style in algebra to to write the literal terms, x - y, to the left of the numerical term.