How to insert an equation with integral

Word 2016 2013 2010 2007 2003
This tip displays how to add an equation with integral, for example, Gauss's law, also known as Gauss's flux theorem.

How to add an equation in your document, see Working with Microsoft Equation.

To add an integral form of the Gauss's law, do the following:

In the Professional format:

   1.   Create your own equation.

   2.   On the Equation tab, in the Structures group, click the Integral button:

Integral button in equations Word 365

In the Integral list, choose Contour Integral:

Contour Integral in Word 365

   3.   In the integral template:

  • In the lower box, enter S.
  • In the upper box, right-click and choose Hide Upper limit in the popup menu:
    Hide Upper limit in popup menu Word 365
  • In the right base box, enter E.

   4.   On the Equation tab, in the Symbols group, in the list of symbols choose Bullet symbol in equations Word 365.

   5.   Then enter dA=.

   6.   On the Equation tab, in the Structures group, click the Fraction button. In the Fraction list choose Stacked Fraction:

Stacked Fraction in Word 365

   7.   Enter Q at the top of your fraction.

   8.   In the bottom of your fraction, do the following:

  • On the Equation tab, in the Structures group, click the Script button.
  • In the Script list, choose Subscript:
    Script symbol in equations Word 365
  • On the Equation tab, in the Symbols group, in the list of symbols choose Epsilon symbol in equations Word 365,
  • In the lower box of the subscript, enter 0.
Gauss's law in Word 365

In the Linear format:

   1.   Create your own equation.

   2.   Do one of the following:

  • On the Equation tab, in the Symbols group, click the More button:
    More symbols in Word 365

    In the top of the list of symbols, choose Operators:

    Menu in Word 365

    In the Operators list, choose Countor Integral in equations Word 365.
  • Simply enter \oint.

   3.   Enter _S. Then you enter a space key; this linear formula transformed into a professional format.

   4.   In the base box of integral, enter E.

   5.   On the Equation tab, in the Symbols group, choose Bullet symbol in equations Word 365 (or simply enter \bullet).

   6.   Then enter dA=Q/, choose Epsilon symbol in equations Word 365 (or simply enter \varepsilon) and then _0:

linear part in Word 365

Then you enter a space key, your linear formula transformed into the professional format.

See also how to create other types of equations.

See also this tip in French: Comment insérer une équation avec l'intégrale.

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