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negative 4 with negative 3 as an exponent
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To write an exponent on a laptop you would use the "^" key. For example, "3^2" would be "three squared."
A scientific calculator should have several related keys: a power key, often labeled something like xy or yx, to calculate powers; two antilogarithm keys (10x and ex), which often require you to press some sort of "shift" key first; and a key to type numbers in scientific notation - sometimes labeled something like "EXP". To use the latter key, type the mantissa, press the key, then type the exponent.
if there is no exponent shown, then the exponent is 1. ex: 41