Final answer:
A compound sentence combines at least two independent clauses using a coordinating conjunction, semicolon, or comma. An example expressing personal happiness is: 'Reading a good book brings me immense joy, and playing the piano soothes my soul.'
Step-by-step explanation:
A compound sentence is formed by joining at least two independent clauses. Each clause is a complete thought with a subject and a predicate and can stand alone as a sentence. When creating compound sentences, one can use a comma and a coordinating conjunction such as 'for', 'and', 'nor', 'but', 'or', 'yet', and 'so'. Here is an example of a compound sentence crafted to share personal happiness:
Reading a good book brings me immense joy, and playing the piano soothes my soul.
In this sentence, both clauses are independent and of equal importance, and they are connected using the coordinating conjunction 'and' to form a single sentence.