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##Convex, 27 bytes
9´{_´f{æ*'×@@'=\_s,¿)S*}N}%
Try it online!
Use the following version if only a single space is required between each equation: ##Convex, 21 bytes
9´{_´f{æ*'×@@'=\S}N}%
Use the following version if only a single space is required between each equation:
##Convex, 2827 bytes
9´{_´f{æ*'×@@'=\_s,(!¿)S*}N}%
Try it online!Try it online!
##Convex, 28 bytes
9´{_´f{æ*'×@@'=\_s,(!)S*}N}%
