F maj13/C
The F maj13 chord consists of the F (Perfect unison), A (Major third), C (Perfect fifth), E (Major seventh), G (Major ninth) and D (Major thirteenth) notes, with C as the bass note.

How to play the F maj13/C chord
- Play C as the lowest bass note in the left hand
- Find F (Root) on the piano keyboard
- Add A (Major third) — 4 semitones above F
- Add C (Perfect fifth) — 7 semitones above F
- Add E (Major seventh) — 11 semitones above F
- Add G (Major ninth) — 14 semitones above F
- Add D (Major thirteenth) — 21 semitones above F
- Press all 7 notes simultaneously to sound the F maj13/C chord