Evaluate \(\int_1 ^2(6x^2-2x)dx\)

Evaluate \(\int^{\frac{\pi}{2}} _{\frac{-\pi}{2}} cos x dx\)

Evaluate ∫sec\(^2\)θ dθ?

Find ∫(sin x + 2)dx

Evaluate \(\int^{2}_{0}(x^3 + x^2)\)dx.