The number of hydrogen atoms is the double of the number of carbon atoms + 2
Here are the changes that may occur comparing to linear alkanes:
Ramification: No modification
Double bond C=C : -2 H atoms
Triple bond C$\equiv$C : -4 H atoms
Cycle : -2 H atoms
One added halogen : - 1 H atom+ 1 halogen atom
Oxygen interposed between C and H : + 1 O atom
Oxygen interposed between C and C : + 1 O atom.
Double bond C=O : -2 H atoms + 1 O atom
Nitrogen interposed : +1 H atom + 1 N atom
The molecule has 28 C atoms, The corresponding linear alkane would have the formula $C_{28}H_{58}$
5 cycles:→ -10H
5 C=C:→ -10H
2 C=O→ -4H+2O
1 N:→ +1H+N
3 F:→ -3H+3F
..so the molecular formula is:
$C_{28}H_{32}O_2NF_3$