Englishfor English speakers
normal
Adjective
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A normal thing, or situation, is one that is not special.
A normal computer has a keyboard, and a screen.
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When someone is back to normal, he is healthier and no longer sick.
I am glad he is back to normal after one week of the flu.
algebra
Noun
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Algebra is a kind of mathematics where a letter (called a variable) can replace a number that is not known.
Using algebra, we can define a line with the formula mathy = x + 3/math