{"type":"rich","version":"1.0","title":"38175425 Does [1 - x] equal to -1 and why?","html":"<iframe src=\"https://www.desmos.com/calculator/ixg6skc5ew?embed\" width=\"500px\" height=\"500px\" style=\"border: 1px solid #ccc\" frameborder=0></iframe>","width":500,"height":500}