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4*x^3+20*x^2-(28*x) > 0
1672;55
(-81/x)^2
e/4 = 2.5
x+60 = 3*x
| 7k-3+2-16=5k-7 | | 3x-4y=100 | | 3x+4y-25=0 | | 10+4[5x-3(-4x+2y)]= | | 8x+7=-81 | | 3x-7+4(x+3)=5x+3-2(x-3)-10 | | -5+5x-4x=-16 | | 0.10x=0.05x+150 | | Y=-200-6 | | -2.5+n(5-15)= | | -4x^2-2-10x=0 | | 6cosx=6sinx | | -7-3x+2=-8-8 | | 3(7-7k)=-105 | | -2c^2+16c-32=0 | | sin55=×/12 | | -8w-37=7w | | x-.15x=160000 | | 6ab+ab-2ab= | | 4+(-3)+(-2)= | | y=5000+7.25*30000 | | e/4=2.5 | | 7x+6x+7=85 | | 2a=2b-3c | | (7-I)(3-2i)= | | 15000=8x-(3100+1.04x) | | -2.5-6.5= | | Sin32=x/18 | | 5x+501=3x+5 | | 3pq+4qr+2pqr= | | 6=7+y | | -x^4+3x^2+4=6 |