How do you simplify \[\left( m+11 \right)+\left( n+44 \right)\]?

Hint: we can solve this by simple simplification techniques. First we have to remove the parentheses of the terms and then we have to make the terms containing variables on one and side and numbers on one side. Then by simplifying the equation we can arrive at our solution.

Complete step by step answer:
First we have to make the equation without parentheses.
Given equation is
\[\left( m+11 \right)+\left( n+44 \right)\]
After removing the parenthesis. The equation will become
After removing the parentheses of \[\left( n+44 \right)\]
\[\Rightarrow \left( m+11 \right)+n+44\]
Now removing the parentheses of \[\left( m+11 \right)\]. The equation will become
\[\Rightarrow m+11+n+44\]
Now we have to make the like terms on one side and the remaining on the other side.
Now we have to add the numericals in the expression.
Now we have to add 11 and 45 in the expression. Then the expression will look like
\[\Rightarrow m+n+55\]

So the final expression we will get is
\[m+n+55\]

Note: We can do it in many other ways. We can also change it as an equation by making variables containing terms on one side and numericals on one side and then simplifying the equation we will get the result. To add and subtract the terms on both sides of the equation is also a way. And we can also be able to simplify the above equation to get the equation of m and n to get the values of m and n. But here we have to keep it as an expression as the question is given as an expression.