The speed of light is about 3 * 10 to the fifth power km / s. It takes six years for the light from a star to reach the earth. If there is 3 * 10 to the seventh power / s in a year, how far is the star from the earth?

The speed of light is about 3 * 10 to the fifth power km / s. It takes six years for the light from a star to reach the earth. If there is 3 * 10 to the seventh power / s in a year, how far is the star from the earth?

Distance = speed × time = 3 × 10 fifth power × 6x3x10 seventh power = 5.4 × 10 13th power

（-2xy^2)^3+8(-x)^3*(-y^2)*(-y^2)^2
Original formula = (- 2) ^ 3 * x ^ 3 * (y ^ 2) ^ 3 + 8 (- x) ^ 3 * y ^ 4
=
=
And then how to write it

Your first step is wrong
Original formula = - 2 ^ 3 * x ^ 3Y ^ 6-8 * x ^ 3 * (- y ^ 6)
=-8x^3y^6+8x^3y^6
=0

① Xiaoming's family contracted a square orchard with a side length of 3 meters. First, they planned to build a pig farm in one corner of the orchard. If the pig farm is designed to be a square with a side length of 1.4 meters, how much area is left after Xiaoming's pig farm is completed?
② The square of 0.04 to the power of 2010 × [(- 5) to the power of 2010] is___
③ It is stipulated that an operation "*": a * b = (AB) to the power of B, if 3 * 2 = (3 × 2) square = 36, then the result of 1 / 2 * 3 is__

(1) The remaining area of his orchard: (3a) ^ 2 - (3a / 4) ^ 2 = 135a ^ 2 / 16 (M2)
（2）1
（3）9/2