Distribute the expression $4\left(t+6\right)$4(t+6).
Simplify the expression $4\left(8+u\right)$4(8+u).
Distribute the expression $\left(r+3\right)\cdot5$(r+3)·5.
Distribute $4\left(n-2\right)$4(n−2).
Apply properties of operations as strategies to add, subtract, factor, and expand linear expressions with rational coefficients.