$\cos\left(y\right)\sec\left(y\right)=1$
$x^2+5<0$
$11+12x+2\left(-x+3\right)-4x$
$8-i-18i$
$3.\left(4+x\right)=5.\left(x+4\right)+1=3x$
$\left(1-\sin^2z\right)\cdot\left(1+\tan^2z\right)=1$
$x^2+11x+30.25$
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