a) (3^5*m^4*x^7) / n^{-3} : (( x^5*n)/ (3^{-3}*m^{-2}*x^2)) = |Faktoren mit neg. Exponenten verschieben
(3^5*m^4*x^7 * n^{3}) /1 : (( x^5*n^1 *3^{3}*m^{2})/ x^2)) = |Mal Kehrbruch
(3^5*m^4*x^7 * n^{3} *x^2) / ( x^5*n^1 *3^{3}*m^{2}) = |Kürzen
(3^2*m^2*x^7 * n^{2} ) / ( x^3 ) =
(3^2*m^2*x^4 * n^{2} )
b) (x^{n+2}) ^n= x (n+2)*n = x^{n^2 + 2n}
c) (a+b)2*(a-b)2= ((a+b)(a-b))^2
= (a^2 - b^2)^2
= a^4 - 2a^2 b^2 + b^4