(a+c)²=a²+2ac+c²
(f+m)²=f²+2fm+m²
(s-n)²=s²-2sn+n²
(y+x)²=y²+2xy+x²
(p+q)²=p²+2pq+q²
(t-x)²=t²-2tx+x²
(k+b)²=k+2kb+b²
(a+m)²=a²+2am+m²
h-p)²=h²-2hp+ p²
y-b)²= y²-2 yb+ b²
k+m)²=k²+2km+m²
f-h)²=f²-2fh+h²
a+r)²=a²+ 2ar+r²
y-b)²= y²- 2yb+ b²
a+c)²= a²+2 ac+ c²
y+m)²= y²+2 ym+m²
x-y)²=x²-2xy+y²
m-b)²= m²-2mb + b²
c-y)²= c²-2 cy+y²
h-x)²= h²-2 hx+x²
z+b)²=z²+ 2zb+ b²
f-x)²= f²-2 fx+ x²