$-35-\left(-1.28\right)$
$\lim_{x\to2}\left(4\right)$
$4x\:+7\:y\:-\:42\:=\:0\:$
$\left(\frac{3r^6n^3}{2r^5n}\right)^4$
$\frac{1}{\cot\left(x\right)}-\frac{\sec\left(x\right)}{\csc\left(x\right)}=\cos\left(x\right)$
$\int\frac{1}{\left(y^2-1\right)^2}dy$
$x-4\ge2-2x^2$
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