-10
three plus seven equals ten
Unfortunately, due to limitations most mathematical symbols get removed and it leaves gibberish that is impossible to answer Please edit/re submit your question with a full sentence of what you want solved, replacing mathematical symbols by words: plus for + equals for = etc
That word "equals" in there makes it an equation.
The answer to the mathematical equation of 10 plus 90 is 100.
10+30=70-30
-4 plus 10 equals 6.
If x equals 10 and y equals 10, then 9x plus 8y equals 170.
x=10
x + 10
12 + 10 + 11 equals 33
-10 plus 10 equals 0.