①
(1/2)的-1次方-(3.14-π)的0次方+0.25的四次方*4的四次方
=2-1+(0.25x4)⁴
=1+1⁴
=2
②
(-a三次方)*（-a的平方)÷a四次方
=a^5÷a⁴
=a