(a-6)(a+6)(36+а)- (a-18)При а=-1/6

36a^2+a^4-1296-36a^2-(a^2)^2+2a^2\times 18-18^236a2+a4129636a2(a2)2+2a218182

 (x^a)^b=x^ab(xa)b=xab

36a^2+a^4-1296-36a^2-a^4+2a^2\times 18-18^236a2+a4129636a2a4+2a218182

Simplify 18^2182 to 324324

36a^2+a^4-1296-36a^2-a^4+2a^2\times 18-32436a2+a4129636a2a4+2a218324

Simplify 2a^2\times 182a218 to 36a^236a2

36a^2+a^4-1296-36a^2-a^4+36a^2-32436a2+a4129636a2a4+36a2324

 Collect like terms

(36a^2-36a^2+36a^2)+(a^4-a^4)-1296-324(36a236a2+36a2)+(a4a4)1296324

Simplify

36a^2-1296-32436a21296324


 

Simplify

36a^2-162036a21620