¥¦§¨©ª: Expand((a + b)^(2))
¥¦§¨©ª_{1}: Expand((a + b + c)^(2))
¥¦§¨©ª_{2}: Expand((a + b + c + d)^(2))
¥¦§¨©ª_{3}: Expand((a + b)^(3))
¥¦§¨©ª_{4}: Expand((a + b)^(4))