D dy/dx JF-Expert Member Jul 26, 2011 613 108 Oct 10, 2011 #4 karibu sana na ni vyema ukazipitia jf rules.
peri JF-Expert Member Mar 22, 2011 2,579 1,164 Oct 10, 2011 #5 Karibu jamvini, zisome sheria za jf kuepuka matatizo.