Equation of a sphere

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The equation of a sphere with radius $R$ and center $(i, j, k)$ is

$$(x-i)^2+(y-j)^2+(z-k)^2=R^2.$$

Example Question 1

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This is the answer to the question, with a detailed solution. If math is needed, it can be done inline: $x^2 = 144$, or it can be in a centered display:

$$\frac{x^2}{x+3} = 4y$$

And our final answer is 10. $_\square$