若3n=2,3m=5,则32m+3n﹣1=________
若5m=3,5n=2,则52m+n=________.
若xm=2,xn=3,则xm+2n的值为________.
计算:a5·a3·a2=_________;10·102·104=_________.
(1)(-a) 5·(-a) 4=______; (2)(-a) 4·a·(_______)=-a10.
若2n-1·2n+1=20,则n=____________.