REGISTER 
LOGINTrial And Improvement
Easy trial and improvement
Trial and improvement problems of the form x^3+nx=m
Easy trial and improvement with table
Trial and improvement problems of the form x^3+nx=m with a pre-drawn table.
Hard trial and improvement
Trial and improvement problems of the form x^3+ax^2+bx+c=m.
Hard trial and improvement with table
Trial and improvement problems of the form x^3+ax^2+bx+c=m with a pre-drawn table.