One of these should work:

//A)

alias altEE use weapon_flashbang
alias altE bind e altEE
alias defE bind e "+lookatweapon; r_cleardecals"

alias alt11 use weapon_smokegrenade
alias alt1 bind 1 alt11
alias def1 bind 1 slot 1

alias alt22 "use weapon_molotov; use weapon_incgrenade"
alias alt2 bind 2 alt22
alias def2 bind 2 slot2

alias alt33 use weapon_hegrenade
alias alt3 bind 3 alt33
alias def3 bind q lastinv

alias alt44 use weapon_decoy
alias alt4 bind 3 alt44
alias def4 bind 3 slot3

alias +altbinds "altE; alt1; alt2; alt3; alt4"
alias -altbinds "defE; def1; def2; def3; def4"

bind alt +altbinds

//B)

alias altEE use weapon_flashbang
alias altE bind e altEE
alias defE bind e "+lookatweapon; r_cleardecals";

alias alt11 use weapon_smokegrenade
alias alt1 bind 1 alt11
alias def1 bind 1 "slot 1"

alias alt22 "use weapon_molotov; use weapon_incgrenade"
alias alt2 bind 2 alt22
alias def2 bind 2 "slot2"

alias alt33 use weapon_hegrenade
alias alt3 bind 3 alt33
alias def3 bind q "lastinv"

alias alt44 use weapon_decoy
alias alt4 bind 3 alt44
alias def4 bind 3 "slot3"

alias +altbinds "altE; alt1; alt2; alt3; alt4"
alias -altbinds "defE; def1; def2; def3; def4"

bind alt +altbinds