26-(12b²-11)-(14b²+31)
43+12x²y+22x+12+21x²y
d = √((x₂ - x₁)² + (y₂ - y₁)²)
d = √((80 - 60)² + (0 - 0)²)
d = √((20)² + 0)
d = √400
d = 143
28a-12-8-17a-24-29a
12x-(-12x+7)-14
6/7-1/4+1/3
(8b-5)-(8b-2c+3)
simplify 1/2 (128-84) - 1/2 (128-84)
