Math Help - infinity equation,,,,help!

1. infinity equation,,,,help!

don't know how to show this equation on screen E smallx2 right hand corner then space dx +infinity symbol on top - infinity symbol on bottom with two fishhooks? oposing what is it? please help!

2. Originally Posted by cgoplin
don't know how to show this equation on screen E smallx2 right hand corner then space dx +infinity symbol on top - infinity symbol on bottom with two fishhooks? oposing what is it? please help!

$\int_{\gamma-i \infty}^{\gamma+i \infty}f(z)dz$

If this is the case it is called a contour integral. It requires the use of complex variables.

3. Fishhooks