What does this prove?

Thought Id check it out because Im a math buff. Ignore the description. A first grader cannot figure out that 3+2-1-3=1 in 2 seconds nor can most normal human beings. The game was entertaining for about 10-37+3³ seconds. Thats a big zero for those of you that cant do real math, which is exactly how many stars this app would get, except the rating system forces me to dole out an approval rating of ⅕ or 20% to this poorly contrived attempt at education, irritation or whatever this waste of my time was supposed to be.

p.s. - The spiteful little trolls who designed this app were kind enough to rename me. Gurbleblarp? Really?

Gurbleblarp about 1+2=3, v1.0.0