Some mathematics (like some computer code) is skimmable, if you have your eyes trained for it (That’s what a lot of programming and mathematics training is—learning to read.)
However, other mathematics, including most mathematics that you are probably interested in reading (groundbreaking research papers, for example) is just as non-skimmable as deliberately terse code by a master programmer in a terse language with a very large library.
Master programmers (because they do not usually have page limits) generally are not as terse as they can be; mathematicians vary, but sometimes are considerably more terse than they “can” be—because they have human readers who can fill in gaps if they’re relatively obvious.
Some mathematics (like some computer code) is skimmable, if you have your eyes trained for it (That’s what a lot of programming and mathematics training is—learning to read.)
However, other mathematics, including most mathematics that you are probably interested in reading (groundbreaking research papers, for example) is just as non-skimmable as deliberately terse code by a master programmer in a terse language with a very large library.
Master programmers (because they do not usually have page limits) generally are not as terse as they can be; mathematicians vary, but sometimes are considerably more terse than they “can” be—because they have human readers who can fill in gaps if they’re relatively obvious.