5 ¹¹ * 5 ¹³ = 5 ²⁴
( 7 ⁻ ¹ ) ² = 7 ⁻ ²
8 ⁻ ⁹ * 8 ⁻ ⁷ = 8 ⁻ ¹⁶
4,8a⁻⁹b¹¹ * 5a⁶b⁻⁸ = 24a⁻³b³
( 10x⁻⁵ / 7y⁻² )⁻² * 100x⁻⁵y⁵ = ( 10¹°x¹⁰ / 7⁻²y⁴ ) * 10²x⁻⁵y⁵ = ( 10¹²x⁵/y⁵ ) / ( 7⁻²y⁴ ) =
= 10¹² * 7² * x⁵ * y
( ab⁻¹ - a⁻¹b ) / ( a⁻¹ - b⁻¹ ) = (( a/b ) - (b/a )) / ( ( 1/a ) - ( 1/b )) = ( ( a² - b² ) / ab )/
/ (( b - a )/ab ) = ( ( a - b )( a + b ) /ab ) * ( ab / ( b - a )) = - ( a + b ) = - a - b