$\frac{cot\:x}{1+cot^2x}=sin\:x\:cos\:x$
$1+\left(42\right)-\left(-5\right)$
$\left(x^2-y^2\right)dx-xydy=0$
$\left(\frac{5}{3}x^{3a-2}+\frac{6}{5}y^{1-3a}\right)^{2}$
$\frac{1+i}{3+4i}$
$\left(6a+c^4\right)^4$
$6\:x\:6\:x\:6\:x\:6\:x\:6$
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