2y-(x-2y)
-799 Divided by 8
12+3-(+7)-6=
x*x +3x+2=0
-3x(-5) + 10:(-5) –(-6)x(-3)=
2700÷900=
\frac{2x}{5}+\frac{4x}{7}
\frac{4x}{7}-\frac{2x}{5}
a²+b²=
15 + [ (99 - 100 : 2) - 12 . 0 . 3 + 26 ] + 90 : √225 + 3.000 : (40 - 10)
