1).(-0.3-4)²+(-0.3-4)(-0.3+4)+8*(-0.3)
(-4.3)²-2.4+(-4.3)*3.7
4.3²-15.910001-2.4
4.3²-18.310001
2).14(-1/3)+(-1/3)(-1/3)+(-1/3-7)²
(-1-21/3)²+14*(-1/3)+1/3)²
1²/3²(-1-21)/3²-14*1/3
-14/3+1/9+(-22)²/9
484/9-14/3+1/9
484+1/9-14/3
485/9-14/3
485-42/9
443/9
49.22
3).3(a+2b)