Declension table of ?guptasādhanatantra

Neuter	Singular	Dual	Plural
Nominative	guptasādhanatantram	guptasādhanatantre	guptasādhanatantrāṇi
Vocative	guptasādhanatantra	guptasādhanatantre	guptasādhanatantrāṇi
Accusative	guptasādhanatantram	guptasādhanatantre	guptasādhanatantrāṇi
Instrumental	guptasādhanatantreṇa	guptasādhanatantrābhyām	guptasādhanatantraiḥ
Dative	guptasādhanatantrāya	guptasādhanatantrābhyām	guptasādhanatantrebhyaḥ
Ablative	guptasādhanatantrāt	guptasādhanatantrābhyām	guptasādhanatantrebhyaḥ
Genitive	guptasādhanatantrasya	guptasādhanatantrayoḥ	guptasādhanatantrāṇām
Locative	guptasādhanatantre	guptasādhanatantrayoḥ	guptasādhanatantreṣu

Compound guptasādhanatantra -

Adverb -guptasādhanatantram -guptasādhanatantrāt