Please help me with this code {attached}(simple but I could not find correct syntax)

This code contains syms and when I run showing error If the input expression contains a symbolic variable, use the VPA function instead. I tried not working .Please suggest me a solution

[Jan]

Please post a copy of teh complete error message. These messages contain important information, e.g. the line, which causes the error.

[Walter Roberson]

Duplicated by http://uk.mathworks.com/matlabcentral/answers/261084-please-help-me-with-this-code