Упростите выражение:                             //-дробная черта, ^-стпень

1)3//5a^2b^2c*5ab^2c^3*1//3ac^2

 2)1//8xx^5y^4z^3*(-8xy^3z)

3) 3,5xz^3*(3большая1//2x^2z)*(-5xz)

4) 2cd^3*(-1//2cd^2)*(-2c^2d^2)

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