22. Multiply 5x and (-4y + 3z).
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The ISI mark is by far the most recognised certification mark in the Indian subcontinent. The ISI is an initialism of Indian Standards Institution, the name of the national standards body until 1 January 1987, when it was renamed to the Bureau of Indian Standards.
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Here's how to make certain magnets stronger:
Iron bar magnets Fill a bowl or pan with some water. ...
Magnets that have lost their strength Sometimes you can recharge a magnet that has lost some of its original charge. ...
- Magnet stacking One way to make weak magnets stronger is by stacking more of them together.
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