a⋅x=0a\cdot x=0a⋅x=0
(10cosx)(7−4sinx)−(10sinx)(−4cosx)\left(10cosx\right)\left(7-4sinx\right)-\left(10sinx\right)\left(-4cosx\right)(10cosx)(7−4sinx)−(10sinx)(−4cosx)
∫400200qdq\int\frac{400}{\sqrt{200q}}dq∫200q400dq
1+x−23\sqrt{1+x^{-\frac{2}{3}}}1+x−32
x2−4−x2−4x^2-4-x^2-4x2−4−x2−4
−11[(+6)−(+4)]-11[\left(+6\right)-\left(+4\right)]−11[(+6)−(+4)]
x29−9\frac{x^2}{9}-99x2−9
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