Unity-Text上标平方表示形式+text判断文本是否为空

代码

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class textTest : MonoBehaviour
{
    public Text text;
    public Text aText;
    public Text bText;
    public Text cText;
    public Text dText;
    private string valueOfAText;
    private string valueOfBText;
    private string valueOfCText;
    private string valueOfDText;
    private double aValue=0;
    private double bValue =0;
    private double cValue =0;
    private double dValue =0;
    private double resultValue=0;
    // Start is called before the first frame update
    void Start()
    {
        text.text = "D(1)=189.65+69.01A-4.91B+19.99C+5.22D-3.08AB+20.62AC+1.57AD+3.75BC+2.67BD-1.57CD-36.32A" + "\u00B2" + "+0.25B" + "\u00B2" + "-15.8C" + "\u00B2" + "-24.38D" + "