$\left(3m-15z\right)^2=...m^2-...mz+...z^2$  

(a)  

 $\left(2r+7l\right)\left(2r-7l\right)=...r^2-...l^2$  

(a)  

 $\left(k+9g\right)^2=...k^2+...kg+...g^2$  

(a)  

 $\left(12s-4m\right)^2=...s^2-...sm+...m^2$  

(a)  

 $\left(6v+14f\right)\left(6v-14f\right)=...v^2-...f^2$  

(a)  

 $\left(...+...\right)^2=4x^2+24x+36$  

(a)  

 $\left(...-...\right)^2=49x^2-84xy+36y^2$  

(a)  

 $\left(...+...\right)\left(...-...\right)=25p^2-64q^2$  

(a)  

 $\left(...+...\right)=121j^2+110jg+25g^2$  

(a)