Exercise 26

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

  1. \({-21z+14s-18z-56z}\)

  2. \({90z-32}\)

  3. \({30y^{2}-61t^{2}+89t^{2}+94t^{2}}\)

  4. \({23y^{2}+53y^{2}-90y^{2}}\)

in-context