Can I delete these partitions?

[Chthonic]

Hey there. I have a computer that used to have Windows 8, but I want to stick with Windows 7. I am not reinstalling Windows 8 anytime soon. In my Disk Management thing, I see 4 partitions, like Recovery, and some OEM and EFI Partitions. Just to save space, I want to delete them(except for C drive, I'm not stupid to do that.)

These are the info of the partitions:
Winre - 400MB
Healthy(EFI System Partition) - 260MB
Healthy(OEM Partition) - 350MB
Recovery(restores Windows 8 and bloatware, as of now, it doesn't do jack shit.) - 25GB

Can I delete these 4 partitions without it hurting my computer?

I'm new at this partition crap, lol