What cardio machine/routine at the gym will burn the most calories in a 30 - 45 minute span?

I'm in the process of trying to lose lockdown weight and trying to get back to where I was pre-pandemic. At the gym I'll do either the arm or leg/butt weight machines and then move on to cardio. I've been doing the below cardio routine but I want to burn more calories.

Current cardio: 30 minutes walking on the treadmill (frequently changing the incline) and then either 20 minutes on the elliptical or 15 minutes on the ARC Trainer

submitted by /u/diamondeyes7
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source https://www.reddit.com/r/loseit/comments/qwezfm/what_cardio_machineroutine_at_the_gym_will_burn/