2m-16+4(m²-16)
2m-16+4m²-64
2m-80+4m²
4m²+2m-80
2(m-8)+4(m-4)×(m+4)
2(m-8+2(m-4)×(m+4))
2(m-8+2(m*2-16))
2(m-8+2m*2-32)
2(m-40+2m*2)
2m-16+4(m²-16)
2m-16+4m²-64
2m-80+4m²
4m²+2m-80
2(m-8)+4(m-4)×(m+4)
2(m-8+2(m-4)×(m+4))
2(m-8+2(m*2-16))
2(m-8+2m*2-32)
2(m-40+2m*2)