$\lim_{x\to\infty}\left(\frac{\sin\left(4x\right)}{e^x}\right)$
$\lim_{x\to\infty}\frac{\left(2^x+4^x\right)}{5^x-2^x}$
$-7a^2b-2a^2b$
$\left(-15\right)+\left(-12\right)-\left(76\right)+\left(+9\right)-\left(-4\right)-\left(+2\right)+\left(-10\right)-\left(-1\right)+\left(-5\right)+\left(+20\right)$
$3x\ge6$
$\left(x^4\right)^8=x^n$
$\int\left(1-cos\left(x\right)\right)^3\cdot sen\left(x\right)dx$
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