Input:
timer(-x) and sqrt((9)-x*x)
Write:
timer(-x) and sqrt((9)-x*x)
Output:
timer(-x)\ and\ \sqrt {9 - x\ x}== timer(-x)\ and\ \sqrt {9-{x}^{2}}
(d^1.6y)/(dx^1.6)-3(d^0.8y)/dx^0.8+2y-exp(x)=0
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