$\frac{1}{1-\cos^2x}=1+\cot^2x$
$\left(1-sin^2\left(x\right)\right)sin\left(y\right)+sin^2\left(x\right)sin\left(y\right)=sin\left(y\right)$
$\left(+6\right)\:\left(-3\right)\:\left(-9\right)\:\left(-1\right)\:=\:$
$\left(c+3d\right)^3$
$345\:x\:1c\:+\:4d\:+\:15u$
$z^2+40z+360$
$\left(4-4\sqrt{3i}\right)^3$
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