#### Answer

$5x-11y-7z+3r-4s+4$

#### Work Step by Step

To remove parentheses when preceded by a minus sign you must change the sign of each term within the parentheses and drop the leading minus sign.
Parentheses preceded by a plus sign (or implied plus sign) can be removed without changing the terms within the parentheses.
$\ \ \ \ $do not change the sign of any terms
$\overbrace{(5x-11y-2)}\underbrace{-(7z+3)}\overbrace{+(3r+7)}\underbrace{-(4s-2)}$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ $change the sign of each term