How to use the integral function on your calculator.

I have the problem (sin(pi x)- ( x^(3) - 4x)^(2) dx. limits being 0 and 2. The answer should be 9.978.I'm not getting it. Please help.

(2)
Int( sin(pi*x) - (x^3 - 4x)^2 dx
(0)

(2)
Int( Sin(pi*x) - ( x^6 - 8x^4 + 16x^2)) dx
(0)

[-Cos(pi*x) - ((x^7)/7 - (8x^5)/5 +(16x^3)/3)] (2/0)
[-Cos(pi*x) - (x^7)/7 + (8x^5)/5 - (16x^3)/3)] (2/0)
[-Cos(2pi) - (2^7)/7 + (8(2^5))/5 - (16(2^3))/3] - [ -Cos(0) - 0 + 0 - 0]
[-1 - 128/7 + 256/5 - 128/3] - [ -1]
-1 -128/7 + 256/5 - 128/3 + 1
= -9.752

I get '-9.752...'
However, in view of the 'pi' in the Sine function have you made sure your calculator is in radian mode.