$\lim_{x\to1}\left(\frac{\ln\left(x^2\right)}{sin\left(\pi x^2\right)}\right)$
$\left(3x\frac{3}{2}\right)$
$20x^2+44x-15$
$cos\:x\:-2sin^2x+1$
$( 7 c ^ { 2 } + \sqrt { 3 } ) ^ { 2 }$
$\left(9a-5b\right)^2$
$35\:-\:\left(-18\right)$
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