src/doc/*/tutorial/tour_algebra.rst: update an example

The output from one of these examples has changed slightly after a
Maxima upgrade. We add ".expand()" on the end of it to ensure that
the answer is consistent.

Author: orlitzky

src/doc/de/tutorial/tour_algebra.rst

@@ -168,11 +168,10 @@ berechnet:
 
 ::
 
-    sage: s = var("s")
-    sage: t = var("t")
+    sage: s,t = SR.var("s,t")
     sage: f = t^2*exp(t) - sin(t)
-    sage: f.laplace(t,s)
-    -1/(s^2 + 1) + 2/(s - 1)^3
+    sage: f.laplace(t,s).expand()
+    2/(s^3 - 3*s^2 + 3*s - 1) - 1/(s^2 + 1)
 
 Hier ist ein komplizierteres Beispiel. Die Verschiebung des
 Gleichgewichts einer verkoppelten Feder, die an der linken Wand

src/doc/en/tutorial/tour_algebra.rst

@@ -178,11 +178,10 @@ You can compute Laplace transforms also; the Laplace transform of
 
 ::
 
-    sage: s = var("s")
-    sage: t = var("t")
+    sage: s,t = SR.var("s,t")
     sage: f = t^2*exp(t) - sin(t)
-    sage: f.laplace(t,s)
-    -1/(s^2 + 1) + 2/(s - 1)^3
+    sage: f.laplace(t,s).expand()
+    2/(s^3 - 3*s^2 + 3*s - 1) - 1/(s^2 + 1)
 
 Here is a more involved example. The displacement from equilibrium
 (respectively) for a coupled spring attached to a wall on the left

src/doc/es/tutorial/tour_algebra.rst

@@ -160,11 +160,10 @@ de :math:`t^2e^t -\sin(t)` se calcula como sigue:
 
 ::
 
-    sage: s = var("s")
-    sage: t = var("t")
+    sage: s,t = SR.var("s,t")
     sage: f = t^2*exp(t) - sin(t)
-    sage: f.laplace(t,s)
-    -1/(s^2 + 1) + 2/(s - 1)^3
+    sage: f.laplace(t,s).expand()
+    2/(s^3 - 3*s^2 + 3*s - 1) - 1/(s^2 + 1)
 
 Veamos un ejemplo más complicado. El desplazamiento desde el punto de equilibrio
 de dos resortes acoplados, sujetos a una pared a la izquierda

src/doc/fr/tutorial/tour_algebra.rst

@@ -145,11 +145,10 @@ transformée de Laplace de :math:`t^2e^t -\sin(t)` s'obtient comme suit :
 
 ::
 
-    sage: s = var("s")
-    sage: t = var("t")
+    sage: s,t = SR.var("s,t")
     sage: f = t^2*exp(t) - sin(t)
-    sage: f.laplace(t,s)
-    -1/(s^2 + 1) + 2/(s - 1)^3
+    sage: f.laplace(t,s).expand()
+    2/(s^3 - 3*s^2 + 3*s - 1) - 1/(s^2 + 1)
 
 Voici un exemple plus élaboré. L'élongation à partir du point
 d'équilibre de ressorts couplés attachés à gauche à un mur

src/doc/it/tutorial/tour_algebra.rst

@@ -146,11 +146,10 @@ Si può anche calcolare la trasformata di Laplace; la trasformata di Laplace di
 
 ::
 
-    sage: s = var("s")
-    sage: t = var("t")
+    sage: s,t = SR.var("s,t")
     sage: f = t^2*exp(t) - sin(t)
-    sage: f.laplace(t,s)
-    -1/(s^2 + 1) + 2/(s - 1)^3
+    sage: f.laplace(t,s).expand()
+    2/(s^3 - 3*s^2 + 3*s - 1) - 1/(s^2 + 1)
 
 Il successivo è un esempio più articolato. Lo scostamento dall'equilibrio
 (rispettivamente) per due molle accoppiate fissate ad un muro a sinistra

src/doc/ja/tutorial/tour_algebra.rst

@@ -172,11 +172,10 @@ Sageを使って常微分方程式を研究することもできる． :math:`x'
 
 ::
 
-    sage: s = var("s")
-    sage: t = var("t")
+    sage: s,t = SR.var("s,t")
     sage: f = t^2*exp(t) - sin(t)
-    sage: f.laplace(t,s)
-    -1/(s^2 + 1) + 2/(s - 1)^3
+    sage: f.laplace(t,s).expand()
+    2/(s^3 - 3*s^2 + 3*s - 1) - 1/(s^2 + 1)
 
 
 もう少し手間のかかる問題を考えてみよう．

src/doc/pt/tutorial/tour_algebra.rst

@@ -165,11 +165,10 @@ Laplace de :math:`t^2e^t -\sin(t)` é calculada da seguinte forma:
 
 ::
 
-    sage: s = var("s")
-    sage: t = var("t")
+    sage: s,t = SR.var("s,t")
     sage: f = t^2*exp(t) - sin(t)
-    sage: f.laplace(t,s)
-    -1/(s^2 + 1) + 2/(s - 1)^3
+    sage: f.laplace(t,s).expand()
+    2/(s^3 - 3*s^2 + 3*s - 1) - 1/(s^2 + 1)
 
 A seguir, um exemplo mais complicado. O deslocamento, com respeito à
 posição de equilíbrio, de duas massas presas a uma parede através de

src/doc/ru/tutorial/tour_algebra.rst

@@ -162,11 +162,10 @@ Sage может использоваться для решения диффер
 
 ::
 
-    sage: s = var("s")
-    sage: t = var("t")
+    sage: s,t = SR.var("s,t")
     sage: f = t^2*exp(t) - sin(t)
-    sage: f.laplace(t,s)
-    -1/(s^2 + 1) + 2/(s - 1)^3
+    sage: f.laplace(t,s).expand()
+    2/(s^3 - 3*s^2 + 3*s - 1) - 1/(s^2 + 1)
 
 Приведем более сложный пример. Отклонение от положения равновесия для пары
 пружин, прикрепленных к стене слева,

src/doc/zh/tutorial/tour_algebra.rst

@@ -165,11 +165,10 @@ Sage 可以对许多函数进行微分和积分。
 
 ::
 
-    sage: s = var("s")
-    sage: t = var("t")
+    sage: s,t = SR.var("s,t")
     sage: f = t^2*exp(t) - sin(t)
-    sage: f.laplace(t,s)
-    -1/(s^2 + 1) + 2/(s - 1)^3
+    sage: f.laplace(t,s).expand()
+    2/(s^3 - 3*s^2 + 3*s - 1) - 1/(s^2 + 1)
 
 这里是一个更复杂的示例。左侧连接到墙上的耦合弹簧的平衡位移