Create a stereo track

i am trying to generate stereo tones/frequencies

i am trying to create specific frequency
stereo track 1 : 100 hz on left + 200 hz on right duration 2 minute
then after first 2 minutes track
track 2 : 200 hz on left + 300 hz on right duration 3 minute
( this track is supposed to be a continuation of track 1 and should play after first two minutes are completed)
track 3 : 400 hz on left + 500 hz on right duration 5 minute
track 4
track 5
and so on
so basically stereo frequencies should change after desired time and
then i want to export it as a single audio file

so is there any prompt for it

Create first mono track (which will later become the left channel of the future stereo track) and generate what do you want (100 Hz, 200 Hz etc.). Then create second mono track (which will later become the right channel of the future stereo track) and generate what do you want (200 Hz, 300 Hz etc.). Finally merge both tracks into one stereo track

Thank you but i am already doing it, problem is i create first track of 3 minutes export it,then second, then third .
after that i add three tracks one after another and then export the file of 10-12 minutes, and this is very time consuming.
hence looking for a prompt if i can enter frequency numbers according to time frame and all three sequences are exported as one

Of course, you are not doing it optimally and you are wasting a lot of time.
Correct sequence of actions for empty project:

  1. Generate → Tone → Set the desired frequency and duration → Generate button → Cursor at the current clip end position → Generate → Tone → Set the desired frequency and duration → Generate button → Cursor at the current clip end position → …
  2. Track → Add New → Add Mono Track → Cursor on track #2 at the start position → Generate → Tone → Set the desired frequency and duration → Generate button → Cursor at the current clip end position → Generate → Tone → Set the desired frequency and duration → Generate button → Cursor at the current clip end position → …
  3. Make stereo track
  4. Export