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7*x*ln(5*x)-(7*x)
50/9
500*(200-x)
50000*(1-(x/80))^2
pi^2*x^3
| 0.1/49=x/960 | | .5x+7=x+13 | | 15=3+6 | | 22=-8v+6(v+2) | | 4.4s+6.2=88 | | 5x+4=7x-13 | | -1.25x+-26=-1.1+-20.9 | | x-3y=4fory | | 3y^2dx+(2y^2-3xy+5x^2)dy=0 | | 9(x/5)=36 | | 60t-16t=0 | | 55+80+53+x=180 | | 55+88+53+x=180 | | 5x-3=x+7+3x | | 180=2x+105+37+2x+38 | | tann63=14/x | | 5-2x=41+3x | | 3(2x+1.5)=7.5 | | 3x+3(2x-3)= | | 9x-4x+12=15x | | 2x^2+100x-600=0 | | 16xsquared=100 | | 5n+20n=100n | | 5x+5(x-9)= | | 3/(x-2)=y/3 | | 0.1n=25+.05(n-200) | | 3/(x-2)=4/3 | | 3-7=2 | | 14=18-8 | | -(a+2b^2)= | | 200x+100y=100000 | | 16=x/-3 |