What are you/we supposed to do with this? Please include the instructions for the problem, not just the equation/expression.
What is \"tg\"??
Is it supposed to be \"tan\" (since you did post this in the Trigonometry category)? If yes, then there is no multiplication between the function name and its argument. For example: tan(3x-2) not tan*(3x-2).
Or is \"tg\" something else? If so then more information will be needed to solve the problem.
Please re-post your question. \n" );
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