$6x+3<8x-6$
$\left(-yx^3\right)^{\frac{7}{5}}$
$2cos\left(x-15^\circ\right)+-1$
$\lim_{x\to2}\left(\frac{x^2+6x-16}{\sqrt{8-x^2}-x}\right)$
$73.25\cdot5.1$
$25x^2-60xy+75y^2$
$9\cdot5+\left(-4+6\right)\cdot2$
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