https://chart.apis.google.com/chart?...%7D%20%5C%2Cdx ( 16 33/2 17 35/2 18 )
https://chart.apis.google.com/chart?...%7D%20%5C%2Cdx (x+sinx+c x+cosx+c x-cosx+c x-sinx+c x-tanx+c )
https://chart.apis.google.com/chart?...%7D%20%5C%2Cdx ( tan3x+c /12tan3x+c/ 4tan3x+c 4cot3x+c /-4tan3x+c )
https://chart.apis.google.com/chart?...ot%20x%5C%2Cdx
https://chart.apis.google.com/chart?...%20x%2B1%7D%20 ( 7/2 5/3 3/2 1/2 2/3 )