$7\left(3\right)-8-4\left(1\right)$
$x^2+9=100$
$\frac{d}{dx}\left(x^y-\sin\left(2x^2+y\right)-2y^3-7\right)$
$x^2-x\:-90=0$
$\frac{y^6x^3}{y^6x^5}$
$\left(1-j\right)^3$
$x^2+8x+16=9$
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