Given the least power of $m$m in the following expression is $-2$−2, factorise $7m^{-1}+m^{-2}$7m−1+m−2.

Given the least power of $x$x in the following expression is $-7$−7, factorise $x^{-7}-9x^{-5}$x−7−9x−5.

Factorise $2k^{-4}+8k^{-6}$2k−4+8k−6 using the least power of $k$k.

Factorise $6m^{-6}-12m^{-9}$6m−6−12m−9 using the least power of $m$m.

Generalise the properties of operations with rational numbers, including the properties of exponents

Apply algebraic procedures in solving problems