$\left(10w\:-\:15z\:\right)^2\:\:\:\:\:\:\:\:$
$\frac{14+6x^2}{x}$
$\sqrt{\sqrt{16+x}}$
$42.9-\:-135.46$
$-135-\left(-141\right)$
$\left(x^3+8\right)\left(x^4-16\right)\left(x^2-y^2-4x+4\right)$
$2x\:+5\:-\:0.75x\:+\:2$
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