Find the value of: `(-1)^(13)* 2(2^(2^(3)))`

Find the value of (-1)^(^^)13xx2(2^(^^)(2^^3))

Find the Value of -(2)/(13)-:(1)/(7)

Find the value of 2cos^(-1)(3)/(sqrt(13))+cot^(-1)(16)/(63)+(1)/(2)cos^(-1)(7)/(25)

If 2x+3y=13 and xy=6, find the value of 8x^(3)+2yy^(3)

A=([5,1,2],[6,3,4]) find the value of a_(12)+a_(13)-a_(22)"

Find the value of 1-((1(2)/(3))/(3(1)/(2))+(1(1)/(6))/(3(1)/(2)))* a) (3)/(20) (b) (4)/(21)(c)(8)/(21) (d) (13)/(21)

Find the value of 11^(2)+12^(2)+13^(2)+...+20^(2)