(1)已知10m=3,10n=2,求103m+2n+3的值;
(2)已知2x+5y-3=0,求4x·32y的值.
计算:
(1)-2(a3)4+a4·(a2)4;
(2)7x4·x5·(-x)7+5(x4)4-(x8)2;
(3)(-x)5·x3-(-x2)4+[-(-x)2·x2]2;
(4)(a2)m·(an)3-(am-1)2·a3n+2.
若3×9m×27m=321,则m=____;若1284×83=2n,则n=____.
[(a2)3]4=____;(-x5)4+(-x4)5=____;(-a3)5·(-a2)3=____;2m·4n=______.
若x3n=5,y2n=3,则x6ny4n=____.
若a2n=9,则a6n=____.