$\lim_{x\to\infty}\left(1+\frac{7}{x}\right)^{\frac{x}{11}}$
$a+b+c=2$
$x^3+\frac{1}{2}x^3-x^2+6x-7x^2$
$y^4-144$
$f\left(x\right)=7x-8,5x^2+3x^3$
$5=3+c$
$\frac{\left(sin\left(2x\right)+sin\left(4x\right)\right)}{cos\left(2x\right)-cos\left(4x\right)}$
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