$4\cos\left(x\right)=\sqrt{2}$
$12\left(10\right)\left(5\right)$
$\left(\frac{1}{3}y^2-\frac{2}{5}x^2y\right)^2$
$18ax^6y^3-36x^4y^3-54x^2y^8$
$3.85+5.45$
$x+x^3+4-x^3$
$\left(x^{a+1}-1x^{a-n}\right)^2$
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