$4x^2-9y^2=36$
$27x^3-1$
$\frac{7^7}{7^3}$
$64+\left(-140\right)-\left(-272\right)-\left(-475\right)-\left(670\right)$
$3x^2+6x-1$
$\left(2x^3+6x-8\right)+\left(4x^3+9x-4\right)$
$4\sin x+25=27$
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