content: import React from 'react'
  import { connect } from 'react-redux'
  import { subtractionAChange } from '../actions'
  import Subtraction from '../components/subtraction'
  import { push } from 'react-router-redux'
  
  const mapStateToProps = (state) => ({
    ...state.reducer.subtraction
  })
  
  const mapDispatchToProps = {
    onAChange: subtractionAChange,
    push
  }
  
  export default connect(mapStateToProps, mapDispatchToProps)(Subtraction)