Macro for selecting the highest out of 2 dice?

Hey I dont know if anyone is familiar with warhammer.  But it has impact weapons you roll 2d10 and select the highest dice for damage.  It dosent need to be anything fancy.  Then I also need one for selecting the 2 highest dice out of 4 dice, also d10.  Any help would be greatly appreciated!!!  Here is my current Macro. "Clanrat fires from concealment [[1d100<45]]" "The rock slams into you dealing [[2d10+3]] damage"

Keep highest is probably what you want: "Clanrat fires from concealment [[1d100<45]]" "The rock slams into you dealing [[2d10kh1+3]] damage" For 2 out of 4, same syntax, just change that 1 to a 2: "Clanrat fires from concealment [[1d100<45]]" "The rock slams into you dealing [[4d10kh2+3]] damage"

Thank you man.