Question

Упрости: (x3)15⋅(x3)7:(x3)22−(x3)2

Answer 1

$(x {}^{3}) {}^{15} \times ( {x}^{3} ) {}^{7} = {x}^{45} \times {x}^{21} = \\ x {}^{45 + 21} = {x}^{66}$
${x}^{66} \div x {}^{66} = x$
$x - {x}^{6} = x {}^{ - 5}$

Наверно так не уверена