diff --git a/p1/data/m3_deriva.dat b/p1/data/m3_deriva.dat
new file mode 100644
index 0000000..d6942b2
--- /dev/null
+++ b/p1/data/m3_deriva.dat
@@ -0,0 +1,56 @@
+-0.01	5.379E-03
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+2.02	4.140E-03
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