Let's express the following algebraic fractions in the reduced form:
`frac(18a^4b^5c^2)(21a^7b^2)`

Let's express the following algebraic fractions in the reduced form: frac(63a^3b^4)(77b^5)

Let's express the following algebraic fractions in the reduced from: frac(a^2 - ab + b^2)(a^2 + ab) div frac(a^3 + b^3)(a^2 - b^2)

Let's express the following algebraic fractions in the reduced form: frac(x^2 - 3x + 2)(x^2 - 1)

Let's express the following algebraic fractions in the reduced form: frac(x^2 - x - 6) ( x^2 + 4x - 5) xx frac(x^2 + 6x + 5)(x^2 - 4x + 3)

Let's express the algebraic expression given below in reduced form: frac(a^2 xx c^2)(c^2 xx d^2) div frac(bc)(ad)

Let's square the following fractions: frac(4)(7)

Let's square the following fractions: frac(4)(5)

Let's square the following fractions: frac(6)(7)

Let's express the algebraic expression given below in reduced form: frac(x^2y - xy^2)(x^2 - xy)

Let's express the algebraic expression given below in reduced form: frac(p^2 - q^2)(x + y) div frac(p-q)(x^2 - y^2)