$\int\:\:sen^7\left(3x\right)cos\left(3x\right)dx$
$\frac { x ^ { 6 } - 3 x ^ { 4 } + x ^ { 2 } - 3 } { x ^ { 2 } - 3 }$
$sin\left(x\right)^2cos\left(x\right)^2=cos\left(x\right)^2-cos\left(x\right)^4$
$w^2+2w+4w+2$
$\left(\frac{-3x^2}{4}\right)\left(\frac{4}{9}x^2-\frac{5}{3}x+\frac{4}{9}\right)$
$-6xy+\:xy$
$\left(4x-3\right)\le x$
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