1. The problem statement, all variables and given/known data I want to know how to set assumptions in Matlab. i want to integrate 3*a*x/b but i want to tell matlab that b is less than a. 2. Relevant equations 3. The attempt at a solution I know how to set assumptions that a variable is real/nonreal/positive/negative. eg: sym('a','positive') but not specific assumptions as b<a. Thank you in advance.