$$\vec{v} = \vec{a} - \vec{b} - \vec{c} = (7; -2) - (2; 5) - (-3; 3) = (7 - 2 + 3; -2 - 5 - 3) = (8; -10)$$.
Ответ: $$\vec{v} = (8; -10)$$.