HP 42s Program Normal Distibution

[cylurian]

Ok, I got these to programs.

00 { 40-Byte Prgm }
01▸LBL "pdf"
02 MVAR "x"
03 MVAR "μ"
04 MVAR "s"
05 RCL "x"
06 RCL- "μ"
07 RCL÷ "s"
08 X↑2
09 -2
10 ÷
11 E↑X
12 RCL÷ "s"
13 2
14 PI
15 ×
16 SQRT
17 ÷
18 END

Then

00 { 40-Byte Prgm }
01▸LBL "integrate"
02 INPUT "μ"
03 INPUT "s"
04 INPUT "x1"
05 INPUT "x2"
06 ∫FN "pdf"
07 VIEW X
08 END

I know 06 ∫FN "pdf" is wrong, can you help me fix it? Thanks .