In the Synoptics, Jesus showed his divinity by his words and actions.
Jesus equating himself with God:
Luke 8:39 (NASB)
"Return to your house and describe what great things God has done for
you." So he went away, proclaiming throughout the whole city what
great things Jesus had done for him.
Mark 5:19 (NASB)
And He did not let him, but He said to him, "Go home to your people
and report to them what great things the Lord has done for you, and
how He had mercy on you."
Jesus spoke of his divine name and spoke of himself as the divine Son of Man in Daniel 7:
Mark 14:62 (NIV)
"I am," said Jesus. "And you will see the Son of Man sitting at the
right hand of the Mighty One and coming on the clouds of heaven."
Matthew 26:64 (NIV)
"You have said so," Jesus replied. "But I say to all of you: From now
on you will see the Son of Man sitting at the right hand of the Mighty
One and coming on the clouds of heaven."
Jesus equating himself with the other two persons in the Trinity:
Matthew 28:19 ( NIV)
Therefore go and make disciples of all nations, baptizing them in
the name of the Father and of the Son and of the Holy Spirit,
Luke equated Jesus ( the Sunrise from on high) with the God of Israel:
Luke 1:78 (NASB)
Because of the tender mercy of our God, With which the Sunrise from
on high will visit us,
Luke 1:68 (NASB)
"Blessed be the Lord God of Israel, For He has visited us and
accomplished redemption for His people,
Luke 7:16 (NASB)
Fear gripped them all, and they began glorifying God, saying, "A great
prophet has arisen among us!" and, "God has visited His people!"
Mark equates Christ with Yahweh in terms of ability:
Mark 4:41 (NASB)
41 They became very much afraid and said to one another, “Who then
is this, that even the wind and the sea obey Him?”
Psalm 107:29 (NASB)
He caused the storm to be still, So that the waves of the sea were hushed.