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ab-cd+* abcd-*+ ab-*cd+ ab-c+d*
abcd - * + ab - cd * + ab - c * d + abc - d * +
abcd*-+ ab*c-d+ ab-cd+* abc-*d+
XAB+CDE/-x= XAB-C-DE/x= XAB+CDE-/x= NAB-CD-E/x=
ab-c*d+ abc+d*- abcd-+* abc+-*d
abcd×+- abc+×d- abc×+d- -+×abcd
abcd*+- abc+*d- abc*+d- -+*abcd
abcd×+- abc+×d- abc×+d- -+×abcd
(a+b)*(c-d) a+b*c-d a+b*(c-d) (a+b)*c-d
abcbx0>∨∧∧∨ ab∧c∨b∧x0>∨ ab∧cb∧x>0∨∨ ab∧cbx0>∨∧∨
abcd+- abc+*d- abc*+d- -+*abcd
a+b/c+d (a+/(c+ a+b/(c+ a+b+c/d
abcd*-+ ab*c-d+ ab-cd+* abc-*d+
abcbx0>∨∧∧∨ ab∧c∨b∧x0 ab∧cb∧x>0∨∨ ab∧cbx0>∨∧∨
ab+cd-* abcd+-* ab+*cd- abcd*+-
ab*c+ abc*+ ab+ c* abc +*
ab-c*d+ abc+d*- abcd-+* abc+-*d
(a+b)*(c—d) a+b*c-d a+b*(c—d) (a+b)*c—d
a+ b/c+ d (s+b)/(e+d) a+ b/ (c+d) a +b+ c/d
abcbx0>∨∧∧∨ ab∧c∨b∧x0>∨ ab∧cb∧x>0∨∨ ab∧cbx0>∨∧∨