calculations

<script>

var inputExprArray = "1+3*3/5*8*9+7-2*2";

var signArr = inputExprArray.split(/[(0-9),*,\/]+/);
var numbArr = inputExprArray.split(/[+,\-]+/)

console.log(signArr);
console.log(numbArr);



var newArray = numbArr.map(function multiplication(input){
console.log(input);
if(input.search(/[*,\/]+/) == -1){return input;}
else{
var multipl = input.split(/[0-9]+/);
    var numbers = input.split(/[*,\/]+/);
    multipl.pop();

    console.log(multipl);

    console.log(numbers);

var multOfArr = numbers.reduce(function(previousValue, currentValue, currentIndex, array) {
    if (multipl[currentIndex] == ""  ){
  return parseFloat(currentValue)* 1; }
  else if(multipl[currentIndex] == "*"  ){return parseFloat(previousValue) * parseFloat(currentValue);}

else{return parseFloat(previousValue) *(1/ parseFloat(currentValue));}

});
return multOfArr;}
console.log(multOfArr);

}
    );
console.log(newArray);
var lastArr = newArray.reduce(function(previousValue, currentValue, currentIndex, array) {
    if (signArr[currentIndex] == "" ||signArr[currentIndex] == "+" ){
  return parseFloat(previousValue)+ parseFloat(currentValue); }
  else {return parseFloat(previousValue) - parseFloat(currentValue);}
});


console.log(lastArr);
</script>