30 k2+38k+1230\:k^2+38k+1230k2+38k+12
122−(15⋅12)+5612^2-\left(15\cdot12\right)+56122−(15⋅12)+56
(10m5−9n4)3\left(10m^5-9n^4\right)^3(10m5−9n4)3
64−9+5−164-9+5-164−9+5−1
2x+2+7x2x+2+7x2x+2+7x
ddx74−5x\frac{d}{dx}7^{4-5x}dxd74−5x
limx→0(12x3+6x2−24xx)\lim_{x\to0}\left(\frac{12x^3+6x^2-24x}{x}\right)x→0lim(x12x3+6x2−24x)
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