Update app.py

app.py

@@ -46,16 +46,22 @@ SUBJECT_SUBTOPICS = {
         "integration techniques",
         "improper integrals",
         "area between curves",
-        "volumes of revolution",
+        "volume of revolution",
+        "surface area of revolution",
         "arc length",
         "parametric equations",
         "polar coordinates",
         "sequences",
         "series",
+        "integration by parts",
+        "partial fractions",
         "Taylor series",
         "L'Hôpital's rule",
         "mean value theorem",
-        "fundamental theorem of calculus"
+        "intermediate value theorem",
+        "extreme value theorem",
+        "fundamental theorem of calculus 1",
+        "fundamental theorem of calculus 2"
     ],
     "Multivariable Calculus": [
         "partial derivatives",