Infinity plus infinity is without beginning nor ending
Negative infinity plus negative infinity equals negative infinity.
"Infinity + 1" is meaningless both mathematically and philosophically.
Infinity is not actually a number, to you can't do this equation.
Negative infinity plus one.
No, infinity is not measurable, so infinity plus infinity is just the same as infinity.
Infinity is a concept, not a number. Even if it were considered such, infinity plus one is also infinity, and so infinity minus one is still infinity.
Infinity as it goes on, the number DIVERGES to positive infinity.