Question

What does simplify mean in math terminology it's very hard

Answer 1

To simplify something in math, it means to put that something into the best terms for that problem.

For example, if you are asked to simplify a fraction, that means that you need to put the fraction in to the lowest terms.

Hope I helped!
Ossashi 乁(ⱺ ͜ʖⱺ)ㄏ

Answer 2

To simplify a fraction, for instance, it means to bring it down to the simplest form possible.
For example,

10000000/50000000

looks like a really big honkin' number, but when you simplify it, it turns out to be just 1/5.
Hope that helped =)