pdf files; edits

quarto/integrals/make_pdf.jl

@@ -0,0 +1,25 @@
+module Make
+# makefile for generating typst pdfs
+# per directory usage
+
+dir = "integrals"
+files = (
+        "area",
+        "ftc",
+        "substitution",
+        "integration_by_parts",
+        "partial_fractions",
+        "improper_integrals",
+        "mean_value_theorem",
+        "area_between_curves",
+        "center_of_mass",
+        "volumes_slice",
+        "arc_length",
+        "surface_area",
+        "twelve-qs",
+)
+
+include("../_make_pdf.jl")
+
+main()
+end