{"type":"rich","version":"1.0","title":"C = ( 10 ; -2 ), D = ( 4 ; 3 )","html":"<iframe src=\"https://www.desmos.com/calculator/xjcuiabzn0?embed\" width=\"500px\" height=\"500px\" style=\"border: 1px solid #ccc\" frameborder=0></iframe>","width":500,"height":500}