$y=\sqrt{\sec x^2}$
$x\:+\:2y\:-z\:=\:-5$
$\int_0^1\left(\frac{4}{1+x^2}\right)dx$
$2\cdot703$
$x+x^2+x^3+x$
$8x^2-8$
$f\left(x\right)=\left(3x^5+6\right)^4$
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