$2\left(3x-4\right)-3\left(x-6\right)$
$sen^2\cdot\cos\left(x\right)+\cos^4\left(x\right)=\frac{1}{\sec^2\left(x\right)}$
$464 \times 4 + 176 x ^ { 2 } + 121$
$\left(x^2-1\right)\left(x^4+x^2+1\right)$
$\left(3x+4a\right)\left(3x-4a\right)$
$5\sqrt{3}-13.3333333333$
$-\frac{e^x}{e^{2x}}$
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