lib/dydx/algebra/operator/parts/general.rb in dydx-0.1.2 vs lib/dydx/algebra/operator/parts/general.rb in dydx-0.1.3

@@ -41,11 +41,11 @@
                 elsif combinable?(x.x.g, operator)
                   send(operator, inverse(x.x.g, operator)).send(operator, inverse(x.x.f, operator))
                 else
                   super(x)
                 end
-              elsif [:*].include?(operator) && x.inverse?(:+)
-                inverse(::Algebra::Formula.new(self, x.x, operator.to_sym), :+)
+              elsif operator == :* && x.inverse?(:+)
+                -(self * x.x)
               else
                 super(x)
               end
             end
           end