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Question: Grouping certain terms

Question:Grouping certain terms

mvchary 15 Maple
collect coefficients negative
September 22 2015
1

I am using Maple-9 to simplify the expression and the expression is not having numerical coefficients. Example expression is given below.

a2:=(18*d^2*R^2*r-4*d1^3*r+5*R^6-z1*r^3*p-14*r1^3*r*rc+k1*d^2*R^2*r);

 

The question here is: I want to collect all "positive terms" and "negative terms" and assign to new variable.

 

Please suggest steps for the above problem

 

Thank you in advance.

 
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