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Maths – Counting numbers

What is wrong with the following calculations?

<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>v</mi><mo>×</mo><mi>v</mi><mo>×</mo><mn>9</mn><mi>v</mi><mo>×</mo><mi>v</mi><mo>×</mo><mi>v</mi><mo> </mo><mo>=</mo><mo> </mo><mn>13</mn><mi>v</mi></math> ;

<math xmlns="http://www.w3.org/1998/Math/MathML"><mn>3</mn><mo>&#xD7;</mo><msup><mi>k</mi><mn>4</mn></msup><mo>&#xD7;</mo><msup><mi>k</mi><mn>3</mn></msup><mo>&#xA0;</mo><mo>=</mo><mo>&#xA0;</mo><mn>3</mn><msup><mi>k</mi><mn>12</mn></msup></math>” src=”<a href=https://lh3.googleusercontent.com/w0iAQCbXlMdebIUpbILD4K-q7nc9qwoW5569e7gG18JxDcqg-4EVKSiwy-zyP-XhMjsUIp0_y9I3GEiSEm52_tm1krapTMWpTruZZ-PeDYUXQLZveXRBPSESd9p9Eeqgx2mh7-me&#8221; width=”121″ height=”12″>


2 Natural number — counting 1 from 0 until 2

2+5. Addition — counting 5 ones from 2

3×4 Multiplication — faster counting by 4 three times from 0.

<math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mn>6</mn><mn>3</mn></msup></math> Exponent — fastest counting by 6×6 six times from 0.

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