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Calculate the number 258

NUMBERMANIA: Calculate the number 258 using numbers [5, 5, 2, 2, 80, 560] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 14

The first user who solved this task is Djordje Timotijevic.

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Mylar

In 1952, Mylar® was registered as a DuPont trademark for an extraordinarily strong polyester film that grew out of the development of Dacron® in the early 1950s. During the 1960s its superior strength steadily replaced cellophane because of its its superior strength, heat resistance, and excellent insulating properties. The unique qualities of the film made new consumer markets in magnetic audio and video tape, capacitor dielectrics, packaging and batteries possible. By the 1970s, it become DuPont's best-selling film, despite mounting competition. It is also used as food wrap, for balloons, and by instrument manufacturers to produce high-quality drumheads.

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