$x^2\:+\:2x\:+\:1\:=\:36$
$w=x\cdot y\cdot cos\left(z\right);x=t;y=t^2;z=\arccosh\left(t\right)$
$5a+7b-3c+1b-5c+2a$
$\left(4x^3+5x^2y^3\right)\left(5x^2+y^5z^2\right)$
$3-\left(-12\right)$
$y'=t^2\left(x-z\right)+1$
$\left(4ab2\:+\:5xy3\right)2\:$
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