Complex sentence: Lex Luthor has carefully crafted his public persona however to avoid arrest, well known for his philanthropy in donating millions of dollars to Metropolis over the years, funding parks, foundations and medical charities.
Split into simpler sentences: Lex Luthor has carefully crafted his public persona however, in order to avoid arrest. He is well known for his philanthropy; donating millions of dollars to Metropolis over the years, funding parks, foundations and medical charities.