Answer:

1.11m^2+3m

2.−4r2−3s2

3.16pq+2pw−2p

Step-by-step explanation:

1.=7m2+3m+4m2

=(7m2+4m2)+(3m)

=11m2+3m

2.Distribute the Negative Sign:

=r2+s2+−1(5r2+4s2)

=r2+s2+−1(5r2)+−1(4s2)

=r2+s2+−5r2+−4s2

Combine Like Terms:

=r2+s2+−5r2+−4s2

=(r2+−5r2)+(s2+−4s2)

=−4r2+−3s

3.Combine Like Terms:

=10pq+3p+2pw+−5p+6pq

=(10pq+6pq)+(2pw)+(3p+−5p)

=16pq+2pw+−2p