Please substitute your birth month in for x in the following expression.
3 (4x + 5)
For example if Mrs. Cullotta was born in the 13th month (which does not exist :0]) I would evaluate it as
3 (4 (13) + 5)
3 (4x + 5)
For example if Mrs. Cullotta was born in the 13th month (which does not exist :0]) I would evaluate it as
3 (4 (13) + 5)