How to simplify code with Angular.js?

Question

Angular

Hello, friends.
Wrote the code, but it seems it can look much prettier.
The fact is that the first part duplicates the second part, only the variables change. I have 6000 lines of such code.
How to optimize. Thanks in advance.
//FIRST PART

$(function() {

var update12 = function() {
             var val = +this.value;
             var showFirst = [4].indexOf(val) >= 0;
       var showSecond = [3,4,5,6,8].indexOf(val) >= 0;
       $('#f_lr1gr2').toggle(showFirst);
       $('#f_lr1grt').toggle(showSecond);
       !showFirst && $('#f_lr1gr2 select').val(1).change();
       !showSecond && $('#f_lr1grt select').val(1).change();
       };
       

var update44 = function() {
             var val = +this.value;
             var showFirst = [8].indexOf(val) >= 0;
       $('#f_lr1gr2el1').toggle(showFirst);
       $('#f_lr1gr2el2').toggle(showFirst);
       $('#f_lr1gr2el3').toggle(showFirst);
       $('#f_lr1gr2el4').toggle(showFirst);
       $('#f_lr1gr2el5').toggle(showFirst);
       !showFirst && $('#f_lr1gr2el1 select').val(1).change();
       !showFirst && $('#f_lr1gr2el2 select').val(1).change();
       !showFirst && $('#f_lr1gr2el3 select').val(1).change();
       !showFirst && $('#f_lr1gr2el4 select').val(1).change();
       !showFirst && $('#f_lr1gr2el5 select').val(1).change();
       };

 $('#lr1rt').change(update12).change();
$('#lr1rt').change(update44).change();

     });

//ВТОРАЯ ЧАСТЬ

  $(function() {

var update112 = function() {
             var val = +this.value;
             var showFirst = [4].indexOf(val) >= 0;
       var showSecond = [3,4,5,6,8].indexOf(val) >= 0;
       $('#f_sp1gr2').toggle(showFirst);
       $('#f_sp1grt').toggle(showSecond);
       !showFirst && $('#f_sp1gr2 select').val(1).change();
       !showSecond && $('#f_sp1grt select').val(1).change();
       };
       

var update144 = function() {
             var val = +this.value;
             var showFirst = [8].indexOf(val) >= 0;
       $('#f_sp1gr2el1').toggle(showFirst);
       $('#f_sp1gr2el2').toggle(showFirst);
       $('#f_sp1gr2el3').toggle(showFirst);
       $('#f_sp1gr2el4').toggle(showFirst);
       $('#f_sp1gr2el5').toggle(showFirst);
       !showFirst && $('#f_sp1gr2el1 select').val(1).change();
       !showFirst && $('#f_sp1gr2el2 select').val(1).change();
       !showFirst && $('#f_sp1gr2el3 select').val(1).change();
       !showFirst && $('#f_sp1gr2el4 select').val(1).change();
       !showFirst && $('#f_sp1gr2el5 select').val(1).change();
       };

 $('#sp1rt').change(update112).change();
$('#sp1rt').change(update144).change();

     });

Answer 1

Regardless of Angular, at least push all these 1-2-3-4-5 into cycles.
Well, hell with "!showFirst && " - it's easier to stuff it into one if.
In general, your question has nothing to do with Angular.