Vocabulary consisting only from characters you are able to read
効用
こうよう
use, utility, effect, benefitmix
非情
ひじょう
inanimate nature, callous, heartlessmix
最小公倍数
さいしょうこうばいすう
the least common multiplemath
分の
ぶんの
denominator bun no numerator (in writing common fractions), X Yth's (Y bun no X)jlpt3, math