<div class="md-form">

          <input type="text" id="anti" name="anti" class="form-control">

          <label for="anti" class="">What is the number after six?</label>

        </div>

​

<div class="col-12">

                <div class="row">

                  <div class="col-md-6">

                    <div class="row">

                      <label for="quiz" class="ms-5 me-0 col-sm-1 col-form-label">

                        <?php echo $num1 . '+' . $num2; ?> = ?

                      </label>

                      <div class="col-sm-1">

                        <input type="text" class="form-control quiz-control" id="quiz">

                      </div>

                    </div>

                  </div>

​

​