Compute the given expression.

$$(x - 6)(x - 2)-(x - 6)(x - 2)$$

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Simplify.

$$(8m^{-3})(-4m^4)(m^{-4})$$

On a scale drawing of a certain building, 1 in. represents 2.5 ft. The length of one wall in the drawing is 3.6 in. What is the actual length of that wall?

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Simplify.

$$x^{3a}x^{2b}$$

Compute the given expression.

$$(x + 4)(x + 5)-(x + 4)(x + 5)$$

Compute the given expression.

$$(x + 3)(x + 6)+(x + 3)(x + 6)$$

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Simplify.

$$(5x^{-2})(2x^{-4})$$

Multiply.

$$(-2y + 7x)(-2y - 7x)$$

Identify the degree of each term and the degree of the polynomial.

$$9a + 6$$

Simplify. Express using $(a)$ negative exponents; $(b)$ positive exponents.

$$\dfrac{m^5}{m^{10}}$$

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Simplify.

$$x^{2a}x^4$$

Subtract

$$(5x^2 + 6) - (3x^2 - 8)$$

Simplify.

$$(m^8)^4$$

Write using standard notation.

$$3.4 \cdot 10^{-5}$$