x (\binom{a_{1}}{a_{2}}) + y (\binom{b_{1}}{b_{2}}) = (\binom{c_{1}}{c_{2}})

${x \left({a_1 \atop a_2} \right) + y \left({b_1 \atop b_2} \right) = \left({c_1 \atop c_2} \right)}$

Error