Chapter <X>. <Chapter name>

1.1. <Section1 name>

1. Subchapter1 (exercise x.y, exercise x.(y+1), ...)

2. Subchapter2 (exercise x.z, ...)

3. etc. etc.

1.2. <Section2 name>

1. Subchapter1 (exercise x.(z+1), exercise x.(z+2))

2. Subchapter2 (more exercises...)
3. etc. etc.

(more chapters...)