$\"\"$

The word $\"\"$ times $\"\"$ indicates multiplication and the symbol is ( $\"\"$ ).

The symbol of word is $\"\"$ is $\"\"$ ( $\"\"$ ).

Let S = surface area of a sphere and r = radius of a sphere.

The word $\"\"$ radius r squared $\"\"$ represents $\"\"$ .

The word $\"\"$ four times $\"\"$ times the radius r squared is the surface area of a sphere $\"\"$ represents $\"\"$ . $\"\"$

The formula is $\"\"$ .