(ax)' IS NOT EQUAL to x!!!
/me lost 16 points on an exam because of this trivial mistake.
/me bangs head against the wall.
/me says bye-bye to 90+ maths grade.
/me lost 16 points on an exam because of this trivial mistake.
/me bangs head against the wall.
/me says bye-bye to 90+ maths grade.
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