What is the definition of "Chartumim"?
Rashi: Refer to Bereishis 41:8:2:1*
What is the difference between "be'Lahateihem" (here) and "be'Lateihem" (in Pasuk 22)?
Rashi (on Pasuk 22 [citing Sanhedrin, 67b]) and Ramban: "be'Lateihem" is a silent incantation performed via demons; 1 "be'Lahateihem", one performed via black-magic. 2
Rashi (here): As in Bereishis (3:24) "Lahat ha'Cherev ha'Mis'hapeches". See also Ramban.
Ramban: Performed via fiery angels of destruction. See for example Melachim 2, 6:17.
Why did Par'oh, who was certainly a magician in his own right - not turn his own staff into a snake?
Oznayim la'Torah: He took his cue from Moshe, who ordered his second-in-command to perform the miracle.
What is "Gam" coming to include?
Riva (on Pasuk 1): It includes the Egyptian children, who also did so, to show that it is not a big deal, since even children can do it! The Pasuk is inverted, as if it says "Par'oh called also to the Chachamim."