(－4分之1)的5次方×(4分之1)³×(－4分之1)²
= - 4 ^(-5) x 4 ^ (-3) x 4 ^(-2)
= - 4 ^( -5-3-2)
= -4 ^ (-10)
10的m-1次方·10的n-1次方·10的4次方
= 10 ^(m-1+n-1+4)
= 10 ^ (m+n+2)
(x²y³)³+(－2x³y³)²·y的5次方
= x^6 y^9 + 4 x ^6 y ^11
= x^6 y^9 ( 1+ 4y^2)