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I don't how to write the powers or the exponents and the other mathematical expressions

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You write exponents like so:

$\$$(base of exponent)^(power)$\$$

For example, 2 to the power of 5 would be written as $\$$2^5$\$$. That looks like $2^5$

I recommend reading the MathJax tutorial for a full guide on how to type these symbols.

http://www.meta.math.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference

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    $\begingroup$ let's try and see .. $5^8$ $\endgroup$
    – Maher
    May 11, 2014 at 19:08
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    $\begingroup$ thanks ........... $\endgroup$
    – Maher
    May 11, 2014 at 19:09
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    $\begingroup$ @Maher: Note that to write exponents longer than a single character, you need to use braces: 2^10 is $2^10$ but 2^{10} is $2^{10}$. (Of course, you can write $2^{9}$ as 2^{9} as well.) $\endgroup$
    – user856
    May 11, 2014 at 23:07
  • $\begingroup$ How do you do a paper to a negative letter? I.e. 5 to the power of minus $t$? Thanks. $\endgroup$
    – itshanks
    Nov 19, 2016 at 11:03
  • $\begingroup$ You write it as $5^{-t}$. $\endgroup$
    – Pablo Ivan
    Dec 19, 2016 at 22:12
  • $\begingroup$ @PabloIvan Could provide the MathJax code for negative powers? $\endgroup$
    – Zilong Li
    May 30, 2018 at 6:14
  • $\begingroup$ The code is 5^{-t} $\endgroup$
    – Pablo Ivan
    May 31, 2018 at 11:41
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    $\begingroup$ \$5^{2}\$ is the way to write exponents, $5^{2}$ . $\endgroup$ May 16, 2019 at 8:39

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