It depens on what you are trying to do. There are thousands of options. An example of a formula in Excel is =SUM(A1:A23). This formula will add all the values in cells A1 through A23 and display the sum.
Formulaes in chemistry depict the number of atoms, molecules and the elements present in a particular reaction. Example:
2H2 + O2 = 2H2O
An example of a formula in maths:
(a+b)2 = a2 + b2 + 2ab
define the following write the units and formula
Formula: LiI
Formula: NaClO3
hfksjfhjf
Formula: NaI
Formula: H2
Formula: Ca3P2
The formula is CaSiO4.
This formula is written as HgSO4.
MnO2
The chemical formula for table salt is NaCl.
The mathematic formula was incomplete and did not solve the problem. The formula for the cola was a closely guarded secret.