please help me with these questions and hurry thank you

Answer:
Hint
Step-by-step explanation:
[tex]11 (\frac{1}{2})x^{3}*(\frac{1}{2})y[/tex]
[tex]-\frac{11}{2}*\frac{2}{2}[/tex]
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[tex]x^{2} *x^{2} = x^{2+2}[/tex]
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[tex](\frac{3}{2b^{4} }) *(\frac{3}{2b^{4} }) *(\frac{3}{2b^{4} })[/tex]