first calculator
( ) x! Fib sin cos tan ctg π sinh e cosh Min tanh
xy sin-1 10x cos-1 ex tan-1 1/x ctg-1 x2 x3 2x 3x Max ctgh
sinh-1 cosh-1 y tanh-1 ln ctgh-1 log2 log10 2nd Rand Rad

C

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7

8

9

×


4

5

6

-


1

2

3

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0

,

=