$\left(2\cos\left(x\right)-2\cos\left(2x\right)\right)^2$
$\frac{1}{3}m;m=6$
$2\left(2z^2-3z+2\right)$
$\frac{dy}{dx}+\frac{1}{2}sec\left(\frac{t}{2}\right)=3cos\left(\frac{t}{2}\right)$
$\lim_{x\to\infty}\:\sqrt{z+5}-\sqrt{x+9}$
$\int\left(csc^24x\left(cot4x\right)\right)dx$
$x^2<3x+4$
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