Complex sentence: Gogeta does demonstrate access to all of Goku's and Vegeta's attacks, and can blend signature moves from the two (i.e. Big Bang, Kamehameha) or create original attacks.
Split into simpler sentences: Gogeta does demonstrate access to all of Goku's and Vegeta's attacks. He can blend signature moves from the two (i.e. Big Bang, Kamehameha) or create original attacks.