(1)-12012+(
)?1+(π-3)0-(-2)-22 3
=-1+
+1-3 2
1 4
=
;5 4
(2)2m2?(-2mn)?(-
m3n3)1 2
=2×(-2)×(-
)m2+1+3?n1+31 2
=2m6n4;
(3)(-x3)2+(-x2)3-x?x5
=(-1)2?(x3)2+(-1)3?(x2)3-x1+5
=x6-x6-x6
=-x6;
(4)k(k+7)-(k-3)(k+2)
=k2+7k-(k2+2k-3k-6)
=k2+7k-k2-2k+3k+6
=8k+6;
(5)(3x-2y)2-(2y-3x)(3x+2y)
=(9x2-12xy+4y2)-(6xy+4y2-9x2-6xy)
=9x2-12xy+4y2-6xy-4y2+9x2+6xy
=18x2-12xy;
(6)(2a-b+3)(2a+b-3)
=[2a-(b-3)][2a+(b-3)]
=(2a)2-(b-3)2
=4a2-(b2-6b+9)
=4a2-b2+6b-9.