How can i repair/recover my partition?

I have a late 2010 MacBook Air. I was running Windows from an external usb drive on it and I have erased some unused partitions from my MacBook drive using Disk Manager Windows 7. After restart I notice that my primary partition on mac is no longer mounted and somehow has been transformed from HSF to ExFAT. Does anybody know a method to recover my partition or recover the data from it? I also have 50gb of unallocated space that might be use to install windows but I don't know how to create a mbr partition from terminal for Windows. I've attached some pics with the current partition scheme. Thank you.