ДАЮ 50 БАЛЛОВ!!ПОМОГИТЕ!СРОЧНО!

Question

ДАЮ 50 БАЛЛОВ!!ПОМОГИТЕ!СРОЧНО!

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Answer 1

((5m+2)²-(5m-2)²)(12-75m²)/(20(5m-2)(5m+2))=
=(25m²+20m+4-25m²+20m-4)(12-75m²)/(20(25m²-4))=
=40m(12-75m²)/(20(25m²-4))=
=2m*(-1)(75m²-12)/(25m²-4)=
= -2m*3*(25m²-4)/(25m²-4)=
= -6m

15⁴/(45³*3⁹*5⁶)=3⁴*5⁴/(5³*9³*3⁹*5⁶)=1/(5⁵*9³*3⁵)=1/(5⁵*3¹¹)