Declension table of ?saphalayitavya

Neuter	Singular	Dual	Plural
Nominative	saphalayitavyam	saphalayitavye	saphalayitavyāni
Vocative	saphalayitavya	saphalayitavye	saphalayitavyāni
Accusative	saphalayitavyam	saphalayitavye	saphalayitavyāni
Instrumental	saphalayitavyena	saphalayitavyābhyām	saphalayitavyaiḥ
Dative	saphalayitavyāya	saphalayitavyābhyām	saphalayitavyebhyaḥ
Ablative	saphalayitavyāt	saphalayitavyābhyām	saphalayitavyebhyaḥ
Genitive	saphalayitavyasya	saphalayitavyayoḥ	saphalayitavyānām
Locative	saphalayitavye	saphalayitavyayoḥ	saphalayitavyeṣu

Compound saphalayitavya -

Adverb -saphalayitavyam -saphalayitavyāt