Exercise 67

Simplify the following expressions if possible.

  1. \(\displaystyle{ {-y-4y}=}\)

  2. \(\displaystyle{ (-y)(-4y)=}\)

  3. \(\displaystyle{ {-y-2y^{4}}=}\)

  4. \(\displaystyle{ (-y)(-2y^{4})=}\)

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