$-7m^2n+m^2n$
$x-2y+3z=11$
$\log_{x-1}\left(4\right)=2$
$\frac{\left(5x^2-2\right)sinx}{sinx+6}$
$-21+6^2b^{36}$
$\frac{3\sin^2\left(x\right)\cos\left(x\right)}{-3\cos^2\left(x\right)\sin\left(x\right)}$
$\left(3cos\left(x\right)-1\right)\left(2cos\left(x\right)+15\right)$
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