y' = (-cosec^2 x) - (-4sinx) = -cosec^2 x + 4sinx
y = 62^5 = 916132832
y' = -5cos(18-5x) = -5cos(18-5x)
y' = (-cosec^2 x) - (-4sinx) = -cosec^2 x + 4sinx
y = 62^5 = 916132832
y' = -5cos(18-5x) = -5cos(18-5x)