Consider the following expression: -c5*v5*D-8*c2*v4*D-c5*h*D+u2*v2*v6+u3*v6-6*u4*v3+4*u2*v3-4*c2*u3*v2+4*u4-2*c2*u1+4*u1+4*c2*c4 Is there a straightforward way to factor out the common factor "2*c2" from the four terms in which it appears? Thank you.