\[ (a + b)^2 \]
\[ (a - b)^2 \]
\[ (a + b)(a - b) \]
\[ (a + b)(a^2 - ab + b^2) \]
\[ (a - b)(a^2 + ab + b^2) \]
\[ (a + b)^3 \]
\[ (a - b)^3 \]
\[ (a + b + c)^2 \]
\[ (x + a)(x + b) \]
\[ (x + a)(x - b) \]
\[ (x - a)(x - b) \]
