# How do I put integrals into an equation on Worldbuilding StackExchange?

I was trying to figure out how to put an integral into an equation in an answer on Worldbuilding StackExchange but I'm not sure how to? How do I put an indefinite or a definite integral into an equation on Worldbuilding StackExchange?

$\int_a^b \! f(x) \, \mathrm{d}x$