🔬 add test for isArithmetic
🔬 add test for isArithmetic

fuse-box/fuse-box,fuse-box/fuse-box,rs3d/fuse-box,fuse-box/fuse-box,rs3d/fuse-box,pnml/fuse-box,fuse-box/fuse-box,pnml/fuse-box,pnml/fuse-box,rs3d/fuse-box