Preheat oven to 180ºC Peel and section oranges. Cut sections into small pieces. Combine the orange pieces and orange juice. Beat eggs and add oranges, vanilla and almond extract. Mix well. Sift dry ingredients together and add all at once. Pour into a greased and floured 9x13 pan. Combine the brown sugar, chocolate chips and nuts. Sprinkle on top of cake. Bake at 180ºC for 45-50 minutes.