$1.8+0.25+1.12$
$\left(xy\right)^{-1}\left(x^{-1}y^{-1}\right)^{-3}$
$-45x+78$
$\left(-14\right)+\left(x\right)=-10$
$\frac{1^7+b^7}{1+b}$
$\frac{1-\sin^2\left(x\right)}{\cos^2\left(x\right)-1}$
$x^2+9x+6x+54-x^2+3x+2x+6$
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