If we extract just the adjectives from these examples we get the declension of adjectives in case there is no article before them.

declension of gut as an adjective neutral              singular plural masculine singular plural feminine singular plural   Nominative gutes gute Nominative guter gute Nominative gute gute   Genitive guten guter Genitive guten guter Genitive guter guter   Dative gutem guten Dative gutem guten Dative guter guten   Accusative gutes gute Accusative guten gute Accusative gute gute

The endings of the declensions neutral              singular plural masculine singular plural feminine singular plural   Nominative -es -e Nominative -er -e Nominative -e -e   Genitive -en -er Genitive -en -er Genitive -er -er   Dative -em -en Dative -em -en Dative -er -en   Accusative -es -e Accusative -en -e Accusative -e -e