We understand that you're facing concerns about your son's school performance, car repairs, and financial struggles. Firstly, we appreciate that you brought your requests to Jesus. It's only by the name of Jesus that we have access to God, it is only by the name of Jesus that we are saved.
Let's address your concerns a good way to start is to remember what Peter said:
Casting all your anxieties on him, because he cares for you.
Be sober and self-controlled. Be watchful. Your adversary, the devil, walks around like a roaring lion, seeking whom he may devour. Withstand him steadfast in your faith, knowing that your brothers who are in the world are undergoing the same sufferings.
1 Peter 5:7-9 WEB
Regarding your son, God cares about every detail of his life. Praying for his attentiveness in school and success in his math test is important. But also pray that he would be transformed by the renewing of his mind, as Romans 12:2 encourages. This is a great opportunity to guide him in his walk with the Lord and further develop his godly character.
Concerning your car and financial needs, remember that God knows your needs and cares about them. Jesus said:
Therefore don't be anxious, saying, 'What will we eat?', 'What will we drink?' or, 'With what will we be clothed?' For the Gentiles seek after all these things; for your heavenly Father knows that you need all these things. But seek first God's Kingdom, and his righteousness; and all these things will be given to you as well.
Matthew 6:31-33 WEB
Let's pray together:
Dear Heavenly Father,
We come before You in Jesus' name, lifting up our brother and his family. Thank You, Lord, for Your unfailing love and faithfulness.
Father, we pray for his son. Help him to be attentive in school, to pass his math test, and to feel at peace. We pray that he would grow in wisdom and in stature, and in favor with God and man, just as Jesus did.
Lord, we also bring before You their car troubles and financial needs. We ask for Your provision and guidance. Help them to figure out their money and bills, and provide for the repairs and inspection of their car.
In all things, Lord, help them to seek first Your kingdom and Your righteousness. Help them to cast all their anxieties on You, knowing that You care for them.
In Jesus' name, we pray. Amen.
Remember, God is faithful. Trust in Him, and He will act on your behalf. Be anxious for nothing, but in everything, by prayer and petition, with thanksgiving, let your requests be made known to God. And the peace of God, which surpasses all understanding, will guard your hearts and your thoughts in Christ Jesus.
Philippians 4:6-7 WEB