$$\textbf{\textcolor{#4257b2}{Challenge}}$$

Write $2^8 \cdot 16^3 \cdot 64$ as a power of $4$.

$$\textbf{\textcolor{#4257b2}{Mixed Review}}$$

Solve.

$$4x + 2x = 9x - 6$$

Add.

$$(7x^3 + 6x^2 + 4x + 1) + (-7x^3 + 6x^2 - 4x + 5)$$

Multiply.

$$(7t^5)(4t^3)$$

Subtract

$$(6x^5 - 3x^4 + x + 1) - (8x^5 + 3x^4 -1)$$

Simplify.

$$\dfrac{x^9y^7}{x^2y^3}$$

Simplify. Express using a positive exponent.

$$3^0$$

Collect like terms and then arrange in descending order for the variable $m$.

$$-2m + 4m^3 - 7m + 9m^3 + 8$$

Tell whether each expression is a polynomial. If it is a polynomial, identify it as a monomial, binomial, or trinomial.

$$-43$$

Simplify.

$$(a^6)^{5}$$

Write using standard notation.

$$6 \cdot 10^{-4}$$

Multiply.

$$3y^2(6y^4 + 8y^3)$$

Multiply.

$$(4a - 7)(4a + 7)$$

Simplify. Express using exponents.

$$x^3 \cdot x^1$$