1y2dy=1−xdx\frac{1}{y^2}dy=\frac{1}{-x}dxy21dy=−x1dx
−4x2−47x−70-4x^2-47x-70−4x2−47x−70
3x−62x+2≥3\frac{3x-6}{2x+2}\ge32x+23x−6≥3
limx→∞(5−x1+4x)\lim_{x\to\infty}\left(\frac{5-\sqrt{x}}{1+4\sqrt{x}}\right)x→∞lim(1+4x5−x)
7sin3(t)csc(t)+cos2(t)+6cos(−t)cos(t)7sin^3\left(t\right)csc\left(t\right)+cos^2\left(t\right)+6cos\left(-t\right)cos\left(t\right)7sin3(t)csc(t)+cos2(t)+6cos(−t)cos(t)
−3x2+3x+7-3x^2+3x+7−3x2+3x+7
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