Third-gen, a,
n at the root, a,
a ' ；a derivative of the 1st
a'' ；a derivative of the 2nd
a'' ' a derivative of the 3rd
a power of n times.
ak (which is the angle marked k)
f (n)
a> b
a a greater than or equal to b
a less than or equal to b
A marked with a sign reading in the law on the difference between