0. Review of Algebra

Evaluate each expression for $x=-4$ and $y=2$.

$\mid -5y+x\mid$

Add or subtract, as indicated. 3/2k + 5/3k

Add or subtract, as indicated. 1/6m + 2/5m + 4/m

Add or subtract, as indicated. 1/a + b/a²

Add or subtract, as indicated. 5/12x²y - 11/6xy

Add or subtract, as indicated. (17y + 3)/(9y + 7) - (-10y - 18)/(9y + 7)

Add or subtract, as indicated. (7x + 8)/(3x + 2) - (x + 4)/(3x + 2)

Add or subtract, as indicated. 3/(a - 2) - 1/(2 - a)

Add or subtract, as indicated. (x + y)/(2x - y) - 2x/(y - 2x)

Simplify each complex fraction. [ 1 + 1/(1-b) ] / [ 1 - 1/(1+b) ]

Simplify each complex fraction. [ 2/[(x+h)² + 16] - 2/(x²+16)] / h

Simplify each complex fraction. [ 1/[(x+h)² + 9] - 1/(x²+9)] / h