Basic LaTeX questions -


Two about latex (hopefully quick) Question:

  1. How do you choose the job you are doing? I am working in a documentclass {article}, if it counts, I have counted some functions such as 

      function1 function2 (1) function3 function4 ( 2)

  2. How do you make an indication of an integral assessment? I know how to do bracket, but is it possible to do a straight light on the right side of the function along with the limit of integration? I can not understand how to do this.

from the north (1). 

  \ begin {eqnarray} function1 \ nonumber \\ function2 \\ function3 \ nonumber \\ function4 \ end {eqnarray}

Answer (2). 

  $ \ left \ Frac 12 \ right | _1 ^ 2 $

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