# He leveled a path for his anger

"He was so angry that he did everything he could to harm them" or "It was as if his anger was an army and he made a smooth road for it to march on"

# he did not spare them from death

"he did not keep the Egyptians from dying" or "he did not permit the Egyptians to live"

# gave them over to the plague

"he made them all very ill with the plague"