$\left(4x^2+2xy\right)^2$  

(a)  

 $\left(9x^6-10y^8\right)\left(9x^6+10y^8\right)$  

(a)  

 $\left(-4x^2y+8z\right)\left(-4x^2y-8z\right)$  

(a)  

 $\left(2x+3y-3z\right)^2$  

(a)  

 $\left(-4x-5y+2z\right)^2$  

(a)  

 $\left(3x^2+2xy+4y^2\right)^2$  

(a)  

 $\left(5x-3y\right)^3$  

(a)  

 $\left(-4x^2-6x^2\right)^3$  

(a)  

 $\left(3x^2y^2+y^2\right)^3$  

(a)