What are the formulas used in algebra?

(a+b)2

a2+b2+2ab
(a-b)2=a2+b2-2ab
(a+b)2=(a-b)2+4ab
(a-b)2=(a+b)2-4ab
a2-b2=(a+b)(a-b)
(a+b+c)2=(a+b+c+2ab+2bc+2cz)
(a+b)3=a3+b3+3ab(a+b)
(a-b)3=a3-b3-3ab(a-b)
a3+b3=(a-b)(a2-ab+b2)
a3-b3=(a+b)(a2+ab+b2)
a3+b3+c3-3abc=(a+b+c)(a2+b2+c2-ab-bc-ca)
(x+a)(x+b)=x2+x(a+b)+ab ==

3a+10b-b+2a=5a+9b

y=mx+b is another one