I think you might be suffering from a little bit of bias concerning your own comfort with written english with regard to the general population's comfort with written english.
I had a high school teacher (algebra II), my favorite coincidentally, who was actually functionally illiterate. He knew some words, and had a solid understanding of the alphabet, but ask him to parse a sentence or god forbid an essay, and he was completely lost.
He was a native born american, english as only language, and simply could not interact with the written language. If he could have written (in 2009) "give 20 question test for week 1 algebra II student with answer guide" he'd have gotten (based on the prompt I just submitted):
Week 1 — Algebra II: 20 Practice Questions
Simplify: 3(x + 4) − 2(2x − 5).
Solve for x: 5x − 7 = 2x + 11.
Solve: 2(x − 3) = 3(x + 1).
Solve and check: (x/4) + 5 = 11.
Factor: x^2 + 5x + 6.
Factor: 4x^2 − 9.
Factor completely: x^2 − 6x + 9.
Multiply and simplify: (2x − 3)(x + 4).
Expand: (x + 2)^2.
Solve quadratic by factoring: x^2 − x − 12 = 0.
Use the quadratic formula to solve: x^2 + 4x + 1 = 0.
Simplify: (3x^2y)(2xy^3).
Simplify: (x^5)/(x^2).
Solve for x: 2^(x+1) = 16.
Evaluate: f(x) = 2x^2 − 3x + 1; find f(2).
Write equation of a line in slope-intercept form with slope 3 and y-intercept −2.
Find slope of the line through points (1, 4) and (5, −2).
Solve the system by substitution: y = 2x + 1 and 3x − y = 4.
Solve the system by elimination: 2x + 3y = 7 and 4x − 3y = 5.
Simplify and write in simplest radical form: sqrt(50).
Answer Key
3x + 12 − 4x + 10 = −x + 22
5x − 2x = 11 + 7 → 3x = 18 → x = 6
2x − 6 = 3x + 3 → −6 − 3 = x → x = −9
x/4 = 6 → x = 24
(x + 2)(x + 3)
(2x − 3)(2x + 3)
(x − 3)^2
2x^2 + 8x − 3x − 12 = 2x^2 + 5x − 12
x^2 + 4x + 4
(x − 4)(x + 3) = 0 → x = 4 or x = −3
x = [−4 ± sqrt(16 − 4)]/2 = [−4 ± sqrt(12)]/2 = [−4 ± 2√3]/2 = −2 ± √3
6x^3y^4
x^3 (assuming x ≠ 0)
2^(x+1) = 16 = 2^4 → x + 1 = 4 → x = 3
f(2) = 2(4) − 3(2) + 1 = 8 − 6 + 1 = 3
y = 3x − 2
slope = (−2 − 4)/(5 − 1) = (−6)/4 = −3/2
Substitute y: 3x − (2x + 1) = 4 → 3x − 2x − 1 = 4 → x = 5 → y = 2(5)+1 = 11
Add equations: (2x+3y)+(4x−3y)=7+5 → 6x = 12 → x = 2. Then 2(2)+3y=7 → 4+3y=7 → 3y=3 → y=1
sqrt(50) = sqrt(25·2) = 5√2
I'm sure there are many more accesibility stories surrounding these fancy auto-completes.