$\left(sen^2-cos^2x\right)+4sen^2x\:.cos^2x$
$1,32+-0.89+-0,57$
$\int\left(\frac{4}{7+4x}\right)dx$
$\frac{2x+2}{x^2-4}$
$12.319-2715$
$x^2+3x+70$
$\frac{\left(\left(3x-6\right)+7\right)}{\left(3x-6\right)^2}$
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