$tga\left(sena+cota\cdot cos\:a\right)=seca$
$\left(\sin\left(x\right)+\cos\left(x\right)\right).\left(\sin\left(x\right)+\cos\left(x\right)\right)$
$-49+\left(-76\right)-27$
$8b-4b$
$-2+1+5+-7$
$6,168-0,432$
$\int3x^{9}dx$
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