1.
9+12x−2−3x
9−2)+(12x−3x)
7+9x
2.
8+3−5×12x−1
8+3−60x−1
−60x+(8+3−1)
−60x+10
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1.
9+12x−2−3x
9−2)+(12x−3x)
7+9x
2.
8+3−5×12x−1
8+3−60x−1
−60x+(8+3−1)
−60x+10