60 yo oak tree lifting sidewalk, city says I have 2 months to fix it

Just got the letter from the city today.

Would it be prudent to put a lot of money into fixing the walk without removing the tree and offending roots? I know nothing about sidewalk repair, maybe there is a way to do it without removing the tree.

Don't really want to remove the tree, it's been here longer than me, and I'm assuming removal will cost a small fortune.

https://preview.redd.it/3zff72hqtw6h1.jpg?width=2296&format=pjpg&auto=webp&s=87c5887f2816de918941869d4045c26f83728670

https://preview.redd.it/uj8s4xgqtw6h1.jpg?width=4080&format=pjpg&auto=webp&s=ced935aa6dc91eba1523b67733b1b34e15ef27b7

https://preview.redd.it/8plmbxgqtw6h1.jpg?width=4080&format=pjpg&auto=webp&s=4fef866da5b35e8e8197c9b0837a724aeec63e05

https://preview.redd.it/o38yexgqtw6h1.jpg?width=4080&format=pjpg&auto=webp&s=193a0d86919e9afe3010554b8c91c99732b09a54

https://preview.redd.it/ysym1xgqtw6h1.jpg?width=2250&format=pjpg&auto=webp&s=e7541e089714e0a57b38f941e37a959b8705093e