3) [tex](\frac{5a^{3} }{b^{4} } )^{4}[/tex]*[tex]\frac{b^{18} }{50a^{16} }[/tex] = [tex]\frac{625a^{12} * b^{18} }{b^{16} * 50a^{16} }[/tex] = [tex]\frac{25b^{2} }{2a^{4} }[/tex]
4) [tex](\frac{3x^{7} }{y^{10} } )^{4}:(\frac{3x^{6}}{y^{8} } )^{3}[/tex]=[tex]\frac{81x^{28} *y^{24} }{y^{40} * 27x^{18}}[/tex] = [tex]\frac{3x^{10} }{y^{16} }[/tex]
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3) [tex](\frac{5a^{3} }{b^{4} } )^{4}[/tex]*[tex]\frac{b^{18} }{50a^{16} }[/tex] = [tex]\frac{625a^{12} * b^{18} }{b^{16} * 50a^{16} }[/tex] = [tex]\frac{25b^{2} }{2a^{4} }[/tex]
4) [tex](\frac{3x^{7} }{y^{10} } )^{4}:(\frac{3x^{6}}{y^{8} } )^{3}[/tex]=[tex]\frac{81x^{28} *y^{24} }{y^{40} * 27x^{18}}[/tex] = [tex]\frac{3x^{10} }{y^{16} }[/tex]