$\frac{1-2\sin\left(y\right)-2\cos\left(y\right)}{2\sin\left(y\right)-\cos\left(y\right)}=-1$
$\frac{5}{4}x+6-2x$
$-3x^2+25x-6$
$\tan^2x\cot\left(x\right)\csc^2\left(x\right)$
$\frac{\sec\left(a\right)-\cos\left(a\right)}{\sec\left(a\right)}$
$-11x=121$
$4\left(2a+2\right)+4\left(a-b\right)$
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