$\lim_{x\to\infty}\left(-7x+6x^{-7}\right)$
$-3\left(-1.5\right)^2+3\left(-1.5\right)+2$
$\left(xz^2-y^3\right)^3$
$36\cdot i^2$
$2\sin\left(x\right)+2\cos\left(x\right)=1$
$x^2-9x+18=0$
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