Expand the following:
$r\left(r+5\right)$r(r+5)
$w\left(1+w\right)$w(1+w)
Distribute the multiplication:
$y\left(y-9\right)$y(y−9)
$-m\left(m+1\right)$−m(m+1)
Multiplication and division of algebraic exp.(Coefficient should be integers)