How to use the calculator? [closed]

Gentlemen!Tell me what I'm doing wrong.Teach me how to use a calculator.

r=0x21bb0a10745f4e42260f802354007942d012e304d22c2cb539628752464c4a4c s=0x538d3c1ddfee65734bda663d65e14258d44620e3d7a0f87d085b1bb16cc0c31d z=0x7086268014c90c1389f26188d8c3458c423568ed30aa95d96ff0127ad756dc23 P=0x03a0c53fcc4704ba78331a896c3bd684328b44890b25f91cfb853ab0bb301c7875

(G * z) + (P * r) = s*R(x,y)

︡d15cb045-b475-4500-b09f-07bad137b9ac︡{"stderr":"\n\n*** WARNING: Code contains possible implicit multiplication \n Check if any of [ 0x, 1bb, 0745f, 2260f, 02354007942d, 12e, 04d, 2c, 39628752464c, 0x, 38d, 5734bda, 63d, 5e, 4258d, 4620e, 7d, 85b, 6cc, 1d, 0x, 086268014c, 0c, 389f, 6188d, 458c, 23568ed, 0aa, 5d, 6ff, 127ad, 56dc, 0x, 3a, 3fcc, 704ba, 8331a, 96c, 84328b, 4890b, 5f, 1cfb, 53ab, 01c ] need a "" sign for multiplication, e.g. 5x should be 5x ! ***\n\nError in lines 5-5\nTraceback (most recent call last):\n File "/cocalc/lib/python3.9/site-packages/smc_sagews/sage_server.py", line 1234, in execute\n flags=compile_flags), namespace, locals)\n File "", line 1\nSyntaxError: can't assign to operator\n"}︡{"done":true}

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