${\left(m+\_\_\_\_\right)}^2=m^2+14m+49$

Factorize $\left(m^2-6m+9\right)$.

Simplify $(m-10)(m+5)$.

${\left(3a\right)}^2$ is equal to

Expand $(3p+2q{)}^2$ using appropriate identity.

Evaluate $(105{)}^2$ using appropriate identity.

Expand $(2x-5d{)}^2$ using appropriate identity.

Find $(98{)}^2$.

Simplify $(y-5)(y+5)$.