Let $$k$$ be a function such that $$k(x) - k(-x) = 6x$$ for all $$x$$. If $$\displaystyle\int_0^2 k(x)\,dx = 10$$, then $\displaystyle\int_{-2}^{2} k(x),dx =\ ?

Let $$k$$ be a function such that $$k(x) - k(-x) = 6x$$ for all $$x$$. If $$\displaystyle\int_0^2 k(x)\,dx = 10$$, then $$\displaystyle\int_{-2}^{2} k(x)\,dx =\ ?$$