0. Review of Algebra

In Exercises 33–68, add or subtract as indicated. $\(\frac{x + 9}{10x^3}\) + \(\frac{11}{15x^2}\)$

In Exercises 59–66, perform the indicated operations. Indicate the degree of the resulting polynomial. (7x⁴y²−5x²y²+3xy)+(−18x⁴y²−6x²y²−xy)

In Exercises 33–68, add or subtract as indicated. 4/(x²+6x+9) + 4/(x+3)

Find each product. (5r-3t²)²

In Exercises 15–58, find each product. (9−5x)²

In Exercises 33–68, add or subtract as indicated. 3/(x+1) − 3/x

In Exercises 33–68, add or subtract as indicated. 3/(2x+4) + 2/(3x+6)

Find each product. (4m+2n)²

In Exercises 1–6, find all numbers that must be excluded from the domain of each rational expression. (x+5)/(x²−25)

In Exercises 1–4, is the algebraic expression a polynomial? If it is, write the polynomial in standard form. 2x+3x²−5

Perform the indicated operations. Indicate the degree of the resulting polynomial. $(7x^2-8xy+y^2)+(-8x^2-9xy-4y^2)$