LaTex question - keeping variables on the line

[Stephen Tashi]

Is there a way to keep variables in LaTex expressions from being displayed slightly raised above the line of text that surrounds them? Or am I doing something inadvertently that causes some of them to pop-up from the line? For example, the second "n", in the following:

a. Prove or disprove the following statement: For each integer $$n > 0$$ there exists a base $$B > 1$$ so that $$n$$ is palandromic when written in base $$B$$..

 

[HallsofIvy]

Using [ itex ] and [ /itex ] (without the spaces) for shorter expressions will keep them in line- but can cause problems with "high" expressions.

For example, I am using "itex" for $3x^2- 2x$, $\frac{3}{4}$ and $\sqrt{x^2+ y^2+ z^2}$
but "tex" for $$3x^2- 2x$$, $$\frac{3}{4}$$ and $$\sqrt{x^2+ y^2+ z^2}$$

I prefer to put "tex" on separate lines:
$$3x^2- 2x$$
$$\frac{3}{4}$$
$$\sqrt{x^2+ y^2+ z^2}$$

 

[Stephen Tashi]

Thank you. I didn't know about the "itex" tag.