›‰p’PŒ๊ƒNƒCƒYy‘I‘๐ŽฎFTOEICE‘ๅŠwŽ๓Œฑ“มŒPE‰pŒŸ€ˆ๊‹‰z›
Ÿ‚ฟ”ฒ‚ซํƒ‚[ƒh

ก20–โ–ฺ ‰๑“šŒ‹‰สก
•sณ‰๐I
ณ@‰๐Fdifficulty
Žž@ŠิF4307•b
ณ‰๐”F5–โ

‘ๆ21–โ–ฺ
”Šw
mathematics
arithmetic
calculation
calculus
algebra


ƒƒjƒ…[‚ึ
ฤ’งํ