remove mathjs

app/javascript/submission_form/payment_step.vue

@@ -165,34 +165,9 @@ export default {
     }
 
     if (this.field.preferences?.formula) {
-      const {
-        create,
-        evaluateDependencies,
-        addDependencies,
-        subtractDependencies,
-        divideDependencies,
-        multiplyDependencies,
-        powDependencies,
-        roundDependencies,
-        absDependencies,
-        sinDependencies,
-        tanDependencies,
-        cosDependencies
-      } = await import('mathjs')
+      const { Calculator } = await import('./calculator')
 
-      this.math = create({
-        evaluateDependencies,
-        addDependencies,
-        subtractDependencies,
-        divideDependencies,
-        multiplyDependencies,
-        powDependencies,
-        roundDependencies,
-        absDependencies,
-        sinDependencies,
-        tanDependencies,
-        cosDependencies
-      })
+      this.math = new Calculator()
 
       this.isMathLoaded = true
     }