Complex sentence: During her regency, she opposed her co-regents act to give up her son's claim on the Polish throne (1765), founded a textile factory (1763) and a brewery (1766).
Split into simpler sentences: During her regency, she opposed her co-regent's act to give up her son's claim on the Polish throne in 1765. She also founded a textile factory (1763) and a brewery (1766).