$(\frac{z+z^{-1}}{2})^4 $ simplified
sin((x+y)/2) = cos(x/2)
whai is the smallest number that 8 and 12 can divide without remainder
x.x-2x = -1
x = ?
x²\frac{dy}{dx}+3xy=\frac{1}{x}
expand these expressions 1.(c-2)(c+5)
cos(x) = 1,x
590,931,306,099,179,520 x 2 =
1. Rahul and Rohan have 45 marbles together. After losing 5 marbles each, the product of the number of marbles they both have now ...
