(a+b)2=a2+2ab+b2

(5+b)2=+b+b2

(a+7)2=a2+a+

(7a+b)2=*2+**b+b2

(a+5b)2=a2+*a*+*2

(6+z)*(6+z)=+z+z2

(x+1)*(1+x)=x2+x+

(7ax+bz)*(7ax+bz)=*()2+**bz+(bz)2

(vt+1up)*(1up+vt)=(vt)2+*vt*+*()2

(1+z)*(1+z)=+z+z2

(x+6)*(6+x)=x2+x+

(1x+bz2)*(1x+bz2)=*()2+**bz2+(bz2)2

(t+6dp)*(6dp+t)=t2+*t*+*()2


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