Exercise 30

Simplify each expression, if possible, by combining like terms.

  1. \({{\frac{5}{4}}z+{\frac{5}{9}}x+{\frac{4}{3}}x}\)

  2. \({-{\frac{4}{9}}t^{2}+{\frac{7}{6}}z^{2}+1 - {\frac{6}{7}}y^{2}}\)

  3. \({{\frac{1}{3}}y+{\frac{8}{3}}s^{2} - {\frac{8}{7}}t}\)

  4. \({{\frac{7}{3}}x - {\frac{3}{7}}y}\)

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