$3\sin^2z$
$\frac{8x^2}{y}-2$
$\frac{1}{4\:}m+\left(-5\right)$
$\left|\left(35-63\right)+\left(18+15\right)\right|-\left(3\cdot2\right)$
$3a+2a-2a+3b+c$
$\frac{x^2+6x+8}{4x-x^3};x=-2$
$\frac{4}{x^2+5x-14}$
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