Simplify:
15y8÷3y315y^8 ÷ 3y^315y8÷3y3
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15y8÷3y3=153y8−3=5y515y^8 ÷ 3y^3\\[1em] = \dfrac{15}{3}y^{8-3}\\[1em] = 5y^515y8÷3y3=315y8−3=5y5
15y8÷3y3=5y515y^8 ÷ 3y^3 = 5y^515y8÷3y3=5y5
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Evaluate:
90+9−1−9−2+912−9−129^0 + 9^{-1} - 9^{-2} + 9^{\dfrac{1}{2}} - 9^{-\dfrac{1}{2}}90+9−1−9−2+921−9−21
a5b2a2b−3\dfrac{a^5b^2}{a^2b^{-3}}a2b−3a5b2
x10y6÷x3y−2x^{10}y^6 ÷ x^3y^{-2}x10y6÷x3y−2
5z16÷15z−115z^{16} ÷ 15z^{-11}5z16÷15z−11
