I'm trying to create a test class for this and am hitting some errors.  Here's the test class I've tried to make.  I did not include the user info at first but then my code coverage said it was like 20% so I added in user info and that is when the errors started.  it says currently "Error: Compile Error: Only top-level class variables can be declared static at line 27 column 28"

@IsTest
private class CannontDeleteOpportunity95
{
    static testMethod void testDelete()
    {
         Account a=new Account(Name='Test Account');
           insert a;
           
           // create test opportunity
        Opportunity o = new Opportunity(Name='Test Opportunity',closedate=system.today(), stagename='Confirmed Teaching/Class Schedule',Probability=0.95);
        insert o;
        
            //create test user
            Profile p = [SELECT Id FROM Profile WHERE Name='System Administrator'];
      User u = new User(Alias = 'systad', Email='systemadminuser@testorg.com',
      EmailEncodingKey='UTF-8', LastName='Testing', LanguageLocaleKey='en_US',
      LocaleSidKey='en_US', ProfileId = p.Id,
      TimeZoneSidKey='America/Los_Angeles', UserName='systemadminuser@testorg.com');


      System.runAs(u) {
      // The following code runs as user 'u'  
      
           delete o;
        }

    static testMethod void testDeleteFail()
    {
            Account a=new Account(Name='Test Account');
           insert a;
           
           // create test opportunity
        Opportunity o = new Opportunity(Name='Test Opportunity',closedate=system.today(), stagename='Confirmed Teaching/Class Schedule', Probability=0.95);
        insert o;
        
  //create test user
            Profile p = [SELECT Id FROM Profile WHERE Name='Standard User'];
      User u1 = new User(Alias = 'standa', Email='standarduser@testorg.com',
      EmailEncodingKey='UTF-8', LastName='Testing', LanguageLocaleKey='en_US',
      LocaleSidKey='en_US', ProfileId = p.Id,
      TimeZoneSidKey='America/Los_Angeles', UserName='standarduser@testorg.com');


      System.runAs(u) {
      // The following code runs as user 'u1'  
      
           try
           {
              delete o;
              // should throw an exception - the following assertion will cause an error if the code carries on
              System.assert(false);
           }
           catch (DMLException e)
           {
               // expected - could assert the message here
           }
        }
}

You are missing a curly bracket, I've added the correction it to your test class in red.

@IsTest
private class CannontDeleteOpportunity95
{
    static testMethod void testDelete()
    {
         Account a=new Account(Name='Test Account');
           insert a;
           
           // create test opportunity
        Opportunity o = new Opportunity(Name='Test Opportunity',closedate=system.today(), stagename='Confirmed Teaching/Class Schedule',Probability=0.95);
        insert o;
        
            //create test user
            Profile p = [SELECT Id FROM Profile WHERE Name='System Administrator'];
      User u = new User(Alias = 'systad', Email='systemadminuser@testorg.com',
      EmailEncodingKey='UTF-8', LastName='Testing', LanguageLocaleKey='en_US',
      LocaleSidKey='en_US', ProfileId = p.Id,
      TimeZoneSidKey='America/Los_Angeles', UserName='systemadminuser@testorg.com');


      System.runAs(u) {
      // The following code runs as user 'u'  
      
           delete o;
        }
    } // <-- Here's the missing bracket
    static testMethod void testDeleteFail()
    {
            Account a=new Account(Name='Test Account');
           insert a;
           
           // create test opportunity
        Opportunity o = new Opportunity(Name='Test Opportunity',closedate=system.today(), stagename='Confirmed Teaching/Class Schedule', Probability=0.95);
        insert o;
        
  //create test user
            Profile p = [SELECT Id FROM Profile WHERE Name='Standard User'];
      User u1 = new User(Alias = 'standa', Email='standarduser@testorg.com',
      EmailEncodingKey='UTF-8', LastName='Testing', LanguageLocaleKey='en_US',
      LocaleSidKey='en_US', ProfileId = p.Id,
      TimeZoneSidKey='America/Los_Angeles', UserName='standarduser@testorg.com');


      System.runAs(u) {
      // The following code runs as user 'u1'  
      
           try
           {
              delete o;
              // should throw an exception - the following assertion will cause an error if the code carries on
              System.assert(false);
           }
           catch (DMLException e)
           {
               // expected - could assert the message here
           }
        }
}