Помогите::::::::::^^**()(;:"'#@#/^&

$\left \{ {{x^2-x-6 \geq 0} \atop {x^2-4x\ \textless \ 0}} \right. \; \left \{ {{(x-3)(x+2) \geq 0} \atop {x(x-4)\ \textless \ 0}} \right. \; \left \{ {{x\in (-\infty ,-2\, ]\cup[\, 3,+\infty )} \atop {x\in (0,4)}} \right. \; \; \to \\\\x\in [\, 3,4)\\\\(x-3)(x+2) \geq 0\qquad +++[\, -2\, ]---[\, 3\, ]+++\\\\x(x-4)\ \textless \ 0\qquad +++(0)---(4)+++$

////////[ -2] ..............[3] //////////////////////
...................(0) ///////////////(4)............