Complex sentence: Hamsalekha Desi Vidya Samsthe was established in 2004--2005 as a free educational institution for SC/ST and underprivileged children for 8th, 9th and 10th standard in English medium.
Split into simpler sentences: Hamsalekha Desi Vidya Samsthe was established in 2004-2005. The free educational institution started with SC/ST and downtrodden children for 8th, 9th and 10th standard in English medium.