代数計算 diff

diff.txt

diff --git a/AlgebraCalculation.scala b/AlgebraCalculation.scala
index 691cca8..851311d 100644
--- a/AlgebraCalculation.scala
+++ b/AlgebraCalculation.scala
@@ -121,7 +121,7 @@ def expand(xs: Expr): Expr = xs match {
       case List(x) => List(expand(x))
       case (x::y::xs) => multiply(x,y) :: xs
     }
-    Mul(f(xs.toList): _*)
+    mul(f(xs.toList))
   }
   case Add(xs@_*)  => {
     def f(xs: List[Expr]): List[Expr] = xs match {
@@ -129,7 +129,7 @@ def expand(xs: Expr): Expr = xs match {
       case (x::xs) if x != expand(x) => expand(x) :: xs
       case (x::xs) if x == expand(x) => x :: f(xs)