$54,36-45,34+3,4$
$2.36\:-10.58$
$\frac{3}{x}+\frac{1}{2x}-\frac{5}{3x}$
$2x^2-11x+15=0$
$7cos\left(5x\right)+9=12$
$\sin\left(3x\right)+\frac{\sin\left(3x\right)}{1-\sin\left(3x\right)}$
$5.\left(x-\frac{3}{2}\right)\le3.x+\frac{1}{2}$
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