Angular & Math Pow in filters

HTML

<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.0.2/angular.min.js"></script>
<div ng-app="app">
    <div ng-controller="Ctrl">
        
        <form>
        <div class="item">
            <label>Capital</label>
            <input type="range" id="loan" name="loan" ng-model="capital" min="10000" max="1000000" step="10000" value="10000">
            <h1>{{capital}}</h1>
        </div>
        <hr>
        <div class="item">
            <label>Number of years</label>
            <input type="range" id="duree" name="duree" ng-model="time" min="0" max="60" step="5" value="1">
            <h1>{{time}}</h1>
        </div>
        <hr>
            
            <div class="item">
            <label>rate %</label>
            <input type="range" id="duree" name="rate" ng-model="rate" min="1" max="15" step="0.1" value="1">
            <h1>{{rate}}</h1>
        </div>
                
        <div class="item">
            <h1>Monthly payment : {{((capital * (rate /1200) * (time / 12))/12) + (capital / time)  | number:2 }}</h1>
            <h2 >
                
                          

        
            </h2>
        </div>
                       

    </form>
    </div>    
</div>

CSS

m = Monthly payment
K = Kapital
R = Rate %
n = Period of payement, in years


m = [( K * R ) / 12] / [ 1 - ( 1 + ( R / 12 /12 )) ^-n]*12


For 1000000 capital, 60 years  and 5% rate, the answer should be 4386.42

JavaScript

var app = angular.module('app', []);

function Ctrl($scope) {

$scope.Math = window.Math;
};