diff --git a/docs/tutorial/calculation.rst b/docs/tutorial/calculation.rst
index 0c816c005..8edd11887 100644
--- a/docs/tutorial/calculation.rst
+++ b/docs/tutorial/calculation.rst
@@ -5,10 +5,12 @@ Calculation with a jinja type
 
    In this section we will learn how to create new ways of calculation.
 
-
    Up to now, our only way of dynamically (that is, during the runtime) calculating 
    a value is to point on another variable's value. But this is not the only way. 
 
+.. todo:: on peut aussi faire un exercice de ce genre pour la propriété mandatory
+
+
 A jinja calculated variable's hidden property
 ------------------------------------------------
 
@@ -168,9 +170,6 @@ the identifier's variable is named "identifier" by default. Sounds logical:
         dynamic:
           - HTTPS
           - SOCKS
-        dynamic:
-          - HTTPS
-          - SOCKS
 
 Here the identifer's variable takes the value of the `dynamic` family parameter.
 
@@ -253,10 +252,12 @@ In this jinja calculation we have a `my_identifier` jinja variable.
 
 .. type-along:: The `when` and `when_not` parameter notation
 
+.. todo:: ça devrait être sur une autre page. déplacer cela ailleurs
+
 Handling the SOCKS version
 ----------------------------
 
-Now we need to handle the SOKS version as show in the firefox configuration screenshot: 
+Now we need to handle the SOCKS version as show in the firefox configuration screenshot: 
 
 .. image:: images/firefox_soks_version.png